The metal components of our watches, Bandlets, and sunglasses are made of 316L stainless steel, which has been finished with a fine ion-plating process and is virtually nickel-free.

As a result, our products are generally well-tolerated by people with allergies. :)

In our jewelry collections, 316L stainless steel is finished either through ion plating or with 24k real gold or platinum. You can find the exact material description directly on the product page under the specifications. This means you don’t need to worry about allergies here either, as the materials are virtually nickel-free.

All wooden elements that come into contact with the skin are sealed with a natural, water-based varnish. Since it contains no chemical additives, it is also considered skin-friendly.

What makes our products special is that we use natural materials. Just like every tree and every stone, all of our designs are unique in terms of grain, color, and texture—so you’ll receive a truly one-of-a-kind piece. It’s your very own personal piece of nature. :)

We make an effort to show product photos featuring different models in various lighting conditions so that you can get as realistic an impression as possible of what your model might look like.

If the model you received doesn’t quite match your taste or the size isn’t right, we’re of course happy to accept a return. You can find more information here. :)

Each of our pieces of jewelry is, by its very nature—thanks to being handmade and crafted from natural materials—a beautiful, one-of-a-kind creation.

If you’d still like to add a personal touch with an engraving, we recommend consulting trained professionals such as watchmakers or a jewelry store. We do not currently offer this service. For engraving our watches and Bandlets, we recommend using the clasp on the link bracelets.

For our jewellery pieces, we recommend a personalized consultation at your trusted workshop, as the designs are very diverse. We’re currently working on new jewellery collections that offer even more room for personalization. Whether it’s a watch, a Bandlet, or a piece of jewellery—your natural piece will be delivered in a wooden box that can also be personalized at your trusted workshop.

We do not recommend engraving our sunglasses, as this could compromise their construction. However, thanks to the natural structures of the materials, they are already one-of-a-kind pieces anyway!

Please note that engraved models are not eligible for return.

When you take your watch out of the box, the crown is usually secured with a small plastic spacer. This is to ensure—especially with quartz movements—that the battery isn’t drained before the watch reaches you. To start the watch, please remove the spacer, turn the setting wheel to the desired time, and then gently push the crown back into the Case. And just like that, your personal piece of nature is ready to go.

You can find the exact battery life of your one-of-a-kind piece in the instructions, which are available directly on the product page. If you notice that your model’s performance becomes irregular, this is a sign that your battery is dead and needs to be replaced. You can easily have the battery replaced at a jewelry store or watchmaker’s shop near you. Alternatively, we’d be happy to replace your battery at one of our physical Stores.

If you’ve chosen a one-of-a-kind watch with a solar movement, the setup process works a little differently. In this case, the watch is equipped with a rechargeable battery that charges using sunlight or light energy.

To charge your piece of jewelry, first remove the protective film from the glass and then place your model in direct sunlight for at least five hours to charge it. However, especially during months with little sunlight, the watches should be charged under a lamp (30W incandescent bulb or 6W LED with 375 lumens) for 60 hours, since sunlight is a bit too weak to charge the battery during these times. Simply place your watches under any lamp at a distance of about 20 cm—for example, under a desk lamp.

Please note, however, that you should not expose your solar watch to excessive heat (e.g., direct midday sun) to prevent damage. Once your one-of-a-kind watch is charged, the battery will last at least 4 months without needing to be recharged. If the second hand starts ticking in 2-second intervals, that’s a sign that your piece of nature needs some light again and should be recharged.

If your watch has various functions—such as a Date display, a dual-time display, or a chronograph—be sure to familiarize yourself with them in advance so you can make the most of all the features your timepiece has to offer.

If you’ve chosen a model with a mechanical movement, the startup process works a little differently than with a quartz movement. Since you’ve chosen a mechanical movement, there is no battery installed in this case, and you’ll first need to give this one-of-a-kind watch a little help to get it started.

Before winding the watch, please make sure the crown is in the normal position—that is, fully pushed into the case. To wind the watch, turn the crown 40 times clockwise. The mainspring will then be fully wound, and your one-of-a-kind watch will run for approximately 42 hours. If you wear your watch during this time, the running time will be extended because the Movement winds itself automatically with every movement.

Hybrid automatic watches work a little differently than classic automatic watches. They are not wound using the crown but recharge themselves through the movement of the wrist. Therefore, they should be kept in motion regularly so that they continue to run.

When the stored energy runs low, the second hand may jump in two-second increments and the watch may eventually stop. To recharge it, swing it about 2–3 times per second until it resumes its normal one-second tick.

The movement type is always indicated on the Dial of our hybrid automatic watches. You can also find additional information in the instructions on the product page as well as in your order and shipping confirmation.

If your model has various functions, such as a Date display or a dual-time display, be sure to familiarize yourself with them in advance so you can take full advantage of all the features your timepiece has to offer.

To start your new watch, first remove all protective films. For a quartz movement, you can set the time directly by removing the white stopper and turning the small adjustment wheel—the crown—on the side of the Case. Once you’ve set the correct time, gently push the crown back into the Case, and the watch will start running.

If you have an automatic watch or a solar-powered watch, you’ll need to wind it up or charge it first.

Every single Holzkern product comes in a high-quality solid wood box where your piece of nature can be safely stored. The wooden box is lined with cork to provide optimal protection for your piece during shipping and to serve as a sustainable, secure storage solution. The cork insert in our watches and Bandlets is inscribed on both sides with the same phrase. On one side, in German: “as unique as you,” and on the other side, in English: “as unique as you.” You can flip the cork yourself, whichever way you prefer.

In addition, for all models with a link bracelet, we include the appropriate extension links—along with the necessary tool—at no extra charge. This way, you can customize your personal piece of nature to fit you perfectly and start wearing it right away.

For the metal parts of our products, we use exclusively 316L stainless steel, which is essentially nickel-free and usually does not cause problems for people with allergies. That is why this stainless steel is typically labeled as nickel-free.
Many watch brands also use this type of Stainless steel. So if you’ve had allergic reactions to other watches or jewellery in the past, we ask that you double-check whether you’re compatible with this specific type of metal before making a purchase. However, if you do notice an allergic reaction while trying on your one-of-a-kind piece, we’ll of course find a solution. :)

Our jewelry is delivered in a small wooden box, secured on a piece of cork. This not only ensures your piece is optimally protected during shipping, but also makes unboxing a special experience. The wooden box with a magnetic metal clasp not only looks great, but is also perfect for storing your one-of-a-kind pieces, even when you’re traveling.

Due to their size, some items from our men’s collections are packaged in the same boxes you’re already familiar with from our Bandlets.

For our jewelry collection, we follow industry-standard lengths. You can find the exact sizes and lengths of the various collections on the respective product page under “Technical Details.”

With our extender, you can lengthen your bracelets and necklaces from our women’s jewelry collections by up to 8 cm. This allows you to wear your necklaces at different lengths depending on the occasion, or to layer multiple necklaces for a “layered” look.

We use a certified plating process for our products, which we can guarantee will meet all the demands of everyday use.

For our women’s jewelry, we’ve plated 316L stainless steel with 24K real gold, real rose gold, or platinum for a particularly elegant look.

Our men’s collections are made of 316L stainless steel. Higher-quality metal layers (e.g., cobalt) are applied using ion plating, which creates the various color finishes. This is the same technique you’re already familiar with from our watches and Bandlets. This allows you to mix and match all your pieces—whether watches, Bandlets, or jewellery—and they’ll always go together harmoniously.

A quick tip: Here on our jewellery page, you can use the product filter to search specifically for different materials, colors, and styles.

Currently, we offer a select range of letters as pendants in gold- and silver-colored Stainless steel with shimmering white Nacre. However, we plan to offer even more designs in the future so that our customers have even more options for creating their own unique, nature-inspired pieces. :)

For the metal parts of our products, we use exclusively 316L stainless steel, which is essentially nickel-free and usually does not cause problems for people with allergies. That is why this stainless steel is typically labeled as nickel-free.
Many watch brands also use this type of Stainless steel. So if you’ve had allergic reactions to other watches or jewellery in the past, we ask that you double-check whether you’re compatible with this specific type of metal before making a purchase. However, if you do notice an allergic reaction while trying on your one-of-a-kind piece, we’ll of course find a solution. :)

TAC lenses are made up of several layers to ensure optimal protection for your eyes while also enhancing comfort:

• An inner and outer protective layer protects your one-of-a-kind piece from scratches and other damage
• A Uv 400 protective layer shields against UV-B and UV-A rays
• A Category 3 anti-glare coating indicates the tint level

The grey, brown, and green lens colors flatter every face shape and offer exceptional glare protection thanks to their tint. Additionally, the lenses in all of our models are polarized. The tint of our lenses is classified as CAT3—which means the glare protection (0–4) allows you to wear the sunglasses on a bright summer day, during a walk on the beach, or even on the slopes.

In addition to these lens features, we’ve also created models with a color gradient that really catch the eye. You’ll also find mirrored sunglasses in our collection, so you’ll be perfectly equipped for sunny adventures.

Our Holzkern sunglasses come in a kraft paper case lined with microfiber, along with a microfiber lens cloth. To ensure your sunglasses are optimally protected, we recommend storing and transporting them exclusively in the case. This keeps your accessory safe from scratches and other damage and ensures it’s always right at your fingertips.

To ensure you enjoy your pair of glasses for a long time, they should always be stored in the case provided with your order. Over time, fingerprints and dirt can accumulate on the lenses from regular use. To remove these, we recommend using a suitable lens cleaning solution from your optician to protect the lens surface. For quick cleaning on the go, simply use our microfiber lens cleaning cloth to gently wipe your lenses.

If you ever encounter stubborn dirt or dust residue, you can dampen a corner of your eyeglass cleaning cloth and use it to clean your lenses.

Please avoid full contact with water for your one-of-a-kind piece, as this can alter the wood content of your model.

As usual, we produce in small batches to offer a wide variety. So this time, too, we have deliberately crafted some designs as one-of-a-kind pieces, while other models are available in several color variations.

All details and measurements are listed for you in the technical details accompanying the photos. There you’ll also find recommendations to help you find the ideal model that perfectly complements your face shape.

Our acetate frames in various colors are true statement pieces. The material makes them particularly sturdy and durable, ensuring they’ll be a faithful companion in everyday life.

Our metal-frame models can be further adjusted for maximum comfort using the wings on the bridge. Please consult a trained professional at your trusted optician’s office.

Our models with wooden and metal frames are especially versatile and make the perfect combination for an extravagant look.

No matter what Material we use—every piece is one-of-a-kind and designed to flatter your face. :)

All of our sunglasses designs are splash-resistant.

Due to the wooden elements in all our designs, prolonged contact with water should be avoided, as wood is a natural material that can change when exposed to excessive moisture.

To ensure you enjoy your sunglasses for a long time, we recommend taking them off before going for a swim—that way, you won’t lose them! ;)

Our sunglasses are made with TAC lenses that offer excellent sun protection for many everyday activities. With Uv 400 protection, the lenses shield against UVA and UVB rays, allowing you to wear them both at the beach and on the slopes.

The glare protection category indicates the tint level, which relates to the amount of light transmitted. A rating of 0 indicates the highest light transmission, while a rating of 4 indicates the lowest. The level of protection is the exact opposite: 0 means the least protection, and 4 means maximum protection. With their CAT3 rating (i.e., glare protection category 3), our glasses provide excellent protection even for sensitive eyes without being too dark.

You can place your order in our online store easily and securely using a variety of payment options:

• Credit card
• PayPal
• Amazon Pay
• Apple Pay
• eps bank transfer
• KlarnaKlarna - Installment PurchaseKlarna - Purchase on AccountKlarna - Instant Bank TransferKlarna - Direct DebitKlarna - Credit Card

Please note that payment methods may vary from country to country.

You may have received a discount code via email, mail, or social media, or you may have found it directly on our website. Our discount codes and promotions are subject to certain conditions and cannot be combined with one another. As such, they are not applicable to items on sale.

You can redeem a discount code directly during the Secure Checkout process by entering it in the appropriate field and clicking “Apply Discount Code.” It will then appear in the shopping cart summary and be applied immediately. :)

If the discount code doesn't work, you can check the following again:

• Have you met the requirements (e.g., minimum order value, minimum order quantity)?
• Is this model part of the regular lineup? (In other words: not part of the Outlet)
• Did you enter the code in the correct field (discount code) and click “Apply”?
• Is the discount code from a trustworthy source and still valid?
• Is the discount code applicable to the models you want? (Accessories, for example, are often excluded.)
• Did you correctly distinguish between all the 0s and Os, and are there any other typos?

If you can answer all of these questions with YES, then the discount code should be applicable.
If you still encounter a problem, please contact us directly via the service form. Please send us a screenshot of your shopping cart, the discount code, and the error message, and let us know where you found the discount code. We’ll do our best to find a quick solution. :)

Our gift cards have a format of XXXX-XXXX-XXXX and should be entered as a numeric code directly at Secure Checkout in the “Apply Gift Card Code” field. You can use it as an alternative payment method to complete your order.

Our gift cards and gift certificates can only be redeemed in our online store. The advantage is that here you’ll find the widest selection of all our models, and you can take as much time as you want to browse! :)

If the gift card isn’t working, please check the following again:

• Did you type the sequence of numbers correctly and distinguish between all the 0s and Os?
• Is there still a balance available on your gift card?
• Did you enter the gift card code in the correct field?

If you answer YES to these questions but are still having trouble, please contact our Customer Support right away. Please send us a screenshot of your gift card and your shopping cart, and let us know the name of the person who purchased the gift card.

If you don’t use the full value of your gift card in a single order, the remaining balance will stay on your gift card, and you can use it on a future order. Our gift cards don’t expire and can be used toward any product or service we offer. :)

If you wish to return or exchange an order that was placed using a gift card, the amount will be credited back to the gift card, and it will be reactivated. It can then be used for a future order.

You can apply either a discount or a promotion to each order—so here you can decide which one you’d like to use. :)

You can use up to 9 different gift cards in a single order. :)

You can also combine them—for example, 5 gift cards worth €20 each and 1 discount code in a single order. :)

In this case, please check which model you have or what type of movement (automatic, solar, or quartz) is installed in your watch. You can find this information for each model on the website.
If you have a solar-powered or automatic watch, please try resetting it. You can find detailed instructions on how to do this in the manual on our website. If you have a quartz watch, the battery may simply be dead and need to be replaced. You can have this done at a specialty store or a jeweler you trust. Alternatively, you can visit one of our Stores.

If you still encounter any problems, please contact us via our service form, and we’ll find a suitable solution for you.

Holzkern has evolved significantly in recent years. It all started with wooden watches—now we draw on the entire world of natural materials, and our product range has expanded tremendously. To highlight even more strongly the natural diversity that defines Holzkern and makes us so unique as a brand, we’ve created a new logo design.

The delicate form allows for different interpretations, which are reflected in nature and the materials we use. Above all, this modern design stands for one thing: uniqueness!

We’ll be phasing in the new logo on our products step by step. So your custom piece may feature either the Holzkern lettering, the original Tree Rings logo, or the new logo. Ultimately, the most important thing is that your Holzkern model reaches you in the highest quality, as always, and that you enjoy it for many years to come.

What makes our products special is that we use natural materials. Just like every tree and every stone, all of our pieces are unique in their grain, color, and texture—so you’ll receive a truly one-of-a-kind item. It’s your very own piece of nature. :)

We make an effort to show product photos featuring different models in various lighting conditions so that you can get as realistic an impression as possible of what your model might look like.

If the model you received doesn’t quite suit your taste or the size isn’t right, we’re of course happy to accept a return. You can find more information here. :)

Each of our pieces of jewelry is, by its very nature—thanks to our handcrafted production and the use of natural materials—a beautiful, one-of-a-kind creation.

If you’d still like to add a personal touch with an engraving, we recommend consulting trained professionals such as watchmakers or a jewelry store. We do not currently offer this service. For engraving our watches and Bandlets, we recommend using the clasp on the link bracelets.

For our jewellery pieces, we recommend a personalized consultation at your trusted workshop, as the designs are very diverse. We’re currently working on new jewellery collections that offer even more opportunities for personalization. Whether it’s a watch, a Bandlet, or a piece of jewellery—your natural piece will be delivered in a wooden box that can also be personalized at your trusted workshop.

We do not recommend engraving our sunglasses, as this could compromise their construction. However, thanks to the natural textures of the materials, they are already one-of-a-kind!

Please note that engraved models are not eligible for return.

We ship our products worldwide—shipping is free for you. :)

Our team works very quickly, which is why delivery times for in-stock* products are usually only a few business days.

After you place your order, you’ll receive a confirmation email and a shipping notification once your order has been shipped. You’ll also receive another email with the tracking number, which you can use to track your package online. To ensure your order is delivered quickly and securely to your home, our products are shipped by different carriers depending on where you live. Shipping via DHL and Austrian Post is also carbon-neutral.

*For products that are not in stock, you’ll find the estimated delivery time on the respective product page or in the order confirmation. If you’d like to order multiple models with different delivery times, you can select a free partial shipment during the checkout process. Otherwise, to help protect the environment, all products in your order will be shipped together as soon as all unique items are in stock.

We’re also happy to ship orders to Germany via DHL Packstations.
When placing your order, please be sure to include the following information as your shipping address:

• Name
• Field: Company; Postal Code
• Field “Street”: Packstation number
• ZIP Code + City
• Germany

Unfortunately, we are unable to ship to APO, FPO, or P.O. boxes.

You can check the estimated delivery times for each model before placing your order. Our shipping team is very fast and processes your order within a few business days, but we currently also offer express shipping to Austria, Germany, France, the United Kingdom, Italy, and Switzerland. You can select this option instead of standard shipping, and your package will arrive within 1–2 business days.

As soon as your order is on its way, we’ll let you know that it’s been shipped. :)

Our primary goal is to offer our customers the greatest possible variety. That’s why all our one-of-a-kind pieces are produced in small batches and are therefore occasionally out of stock.

If a product page lists a future delivery date, you can pre-order that model. If it simply says that it’s sold out, the model will likely no longer be available. When you place a pre-order, the amount will be charged immediately, depending on the payment method you select.

As soon as the model you ordered is back in stock, we’ll of course ship it to you right away. We want to keep your wait as short as possible, and we’ll email you a tracking link after shipment so you can track your model until it’s delivered.

You may have chosen a one-of-a-kind piece that features a 24-hour display. This is designed to distinguish between morning and afternoon (AM and PM). If this display doesn’t match the current time of day, simply pull out the crown as if you were setting the time. Then turn the time forward exactly 12 hours, and the display will be correct again. (If your timepiece also has a Date display, you may need to reset the date.)

A chronograph is nothing more than a stopwatch that allows you to measure a specific period of time. These watches feature a button above and below the crown, which are used to start and stop the time, respectively.

The top button is for starting and stopping the timer; use the bottom button to reset the time. If the hand isn’t exactly at zero or you want to stop the timer from a different position, you can manually adjust the stopwatch seconds hand. To do this, pull the crown out of the Case once or twice until the time stops completely. Then you can adjust the hand using the top button.

To set the date on your watch, pull the crown out one click. Then, turn the crown (the setting wheel) counterclockwise to set the correct date.

Please note, however, that you should not set the date between 9:00 p.m. and 1:00 a.m., as the date may not change correctly the next day.

Please also note that your model does not have a “perpetual calendar,” so you’ll need to manually correct the date after a month with 28, 29, or 30 days.

With the Dual Time function, you can set a second time in addition to the standard time. This can be very handy, for example, on business trips when you’re crossing time zones. Of course, you can set any time you like. To set the time, simply press the two buttons on the side of the Case; this allows you to adjust the display by +/- 15 minutes.

This system features a removable bezel. To ensure the bezel stays securely in place, turn it clockwise like a screw while applying light pressure toward the Case until it clicks into place.

But it doesn’t work like a bottle cap! You can’t tighten it all the way until you can’t turn it any further. That would damage the threads and the glass. However, there is, of course, a position where it’s tight enough that it won’t come loose on its own. To find this, you simply need to determine the point of greatest resistance.

Creating a customer account offers you many benefits:

You can save different addresses to complete your orders more quickly. You also have the option to view all your orders and invoices at any time and can create a list of your favorite models.

When you sign up, you automatically become a member of our Holzkern Premium Club and get the chance to take advantage of one-time offers. With every purchase, you earn premium points, known as “Tree Rings.” These can then be redeemed for one-of-a-kind premium products, great discounts, and exclusive services. Plus, you’ll always receive a little surprise from us on your birthday.

We look forward to welcoming you as a member!

P.S.: Don’t worry—membership is 100% free. ;)

With the Holzkern Premium Club, we want to thank our customers: You can collect Tree Rings with every order. These can then be redeemed for one-of-a-kind premium products, great discounts, and exclusive services.

We look forward to welcoming you as a member!

P.S.: Don’t worry—membership is 100% free. ;)

You’ll receive 10 Tree Rings for every €1 spent on your order as soon as we’ve shipped it.

You can redeem the tree rings you’ve collected directly through your customer account for the following specials:

• Great discounts
• Exclusive premium products
• Exclusive Services

If you return your order or part of your order, the corresponding Tree Rings will be deducted retroactively. In the case of an exchange or a new order, the Tree Rings will be credited to your account as usual after shipment.

Our gift cards have a format of XXXX-XXXX-XXXX and should be entered as a numeric code directly at Secure Checkout in the “Apply Gift Card Code” field. You can use it as an alternative payment method to complete your order.

Our gift cards and gift certificates can only be redeemed in our online store. The advantage is that here you’ll find the widest selection of all our models, and you can take as much time as you want to browse! :)

If the gift card isn’t working, please check the following again:

• Did you type the sequence of numbers correctly and distinguish between all the 0s and Os?
• Is there still a balance available on your gift card?
• Did you enter the gift card code in the correct field?

If you answer YES to these questions but are still having trouble, please contact our Customer Support right away. Please send us a screenshot of your gift card and your shopping cart, and let us know the name of the person who purchased the gift card.

If you don’t use the full value of your gift card in a single order, the remaining balance will stay on your gift card, and you can use it on a future order. Our gift cards don’t expire and can be used toward any product or service we offer. :)

If you wish to return or exchange an order that was placed using a gift card, the amount will be credited back to the gift card, and it will be reactivated. It can then be used for a future order.

So that we can process your package as quickly as possible, please include a copy of the invoice and a note explaining the reason for the return in the package.

In the event of a cancellation, please also include the cancellation form.

To ensure that your returned models are protected as well as possible during shipping, please be sure to return them in their original packaging—that is, depending on the product, in the wooden box, the kraft paper case, or the additional shipping box.
Next, choose an appropriately sized package and fill the empty space with bubble wrap or paper so that your model doesn’t get jostled around inside the package.

This way, your returned one-of-a-kind items are well protected and will arrive safely at our facility.

Once you receive the email confirming that the package has arrived and been processed, it will take a maximum of 14 business days for the amount to be refunded to your original payment method. You will also be notified via email when the refund is credited.