Our yarns mostly come from European manufacturers as well as an innovative Japanese producer. We work exclusively with partners who share our values around sustainability, quality, and transparency.

A material is officially considered bio-based if at least 20–25% of its mass comes from renewable sources such as wood, plant oils, or other plant-based raw materials. We deliberately go further: Many of our yarns are either 100% bio-based or at least 46% bio-based to ensure a real reduction in fossil-based raw materials.

Not all yarns are bio-based. For materials that don’t reach this share, we use modern yarns optimized for environmental aspects — for example through durability, resource efficiency, or recyclability. This way, we ensure our products are designed sustainably without glossing over reality.

We deliberately rely on a variety of materials. That means not only plant-based fibers like cotton, but also other innovative fibers, because different materials enable unique products and designs. We see this diversity as key to success: it creates variety in resources and enables us to develop special, high-quality, and diverse products.

Our long-term goal is to use only yarns with a 100% bio-based share and, in the future, also biodegradable yarns. Important to know: “Bio-based” does not automatically mean biodegradable. A yarn can be made from renewable raw materials without fully decomposing in nature.

To do this, we continuously compare new materials, test their quality, and check how they can be integrated into design and use. This ensures sustainability, comfort, and functionality go hand in hand — and our products remain both responsible and unique.

Through our partnership with Inverto Earth, we support the restoration of coastal ecosystems such as mangrove forests. Inverto Earth works with local communities and innovative technologies like drones, remote sensing, and long-term monitoring to support reforestation projects in a measurable and transparent way. The focus is not only on CO₂ storage, but also on biodiversity, coastal protection, and long-term impact.

Want to add Synix to your range, have a corporate enquiry, or are interested in a possible collaboration? We’re open to B2B enquiries and look forward to exciting partnerships.

Creators, influencers, and anyone who wants to represent our values and products authentically are also very welcome as ambassadors.

The best way to reach us is by email (in**@*********re.ch) or directly via the contact form.

Our products are made in the European part of Turkey. We’ve been there in person several times, took a close look at the production facility, and spoke with employees.

The machines are modern, the working environment is clean and well organized. The conversations with the staff felt open and positive. This allowed us to form our own impression of the conditions—and we were very satisfied with what we saw.

Transparency and respectful interaction at every level are important to us. That’s why we’re in direct contact with the factory and want to continue visiting regularly in the future.

Our designs are created in Winti and come from personal moments, experiences, and symbols that carry stories and memories. They’re inspired by people, movements, and places that shape us. Behind every design is a story that comes to life when you wear it — like our Retro Rips, which create an image on the calf.

Important: Wash before first wear — this removes any production residue and reduces pilling!

Our products can be conveniently machine-washed, but please be gentle:

– Machine wash at max. 30°C
– Do not bleach, iron, or tumble dry
– Do not use dry cleaning or fabric softener

Also avoid strong spin cycles — this protects the material and extends its lifespan.

One more note: Water hardness can affect the fibers. In regions with very hard water, we recommend a limescale filter or an eco-friendly descaler to maintain the fabric’s quality over the long term.

Our socks are elastic and adapt well. In larger sizes, they may sit a bit longer. If you prefer them a little shorter or tighter, you can choose one size smaller if needed.

Every package is hand-packed by us in Switzerland with care and attention to detail. Shipping usually takes place within a few business days (2-3) after payment is received. As soon as your package is on its way, you’ll receive a shipping confirmation by email. Economy shipping is free from CHF 80.-.

Returns:
You have the right to cancel your order within 14 days without giving any reason.

For hygiene reasons, socks can only be returned if they are unopened, unworn, and in their original packaging.

You cover the return shipping costs. Please contact us by email before sending items back: in**@*********re.ch

Once we receive your return, we’ll refund the purchase price minus the original shipping costs within 14 days, using the payment method originally used.

You can find a sample cancellation form in our Terms & Conditions.

We accept all major credit cards and TWINT. Payment is secure, fast, and encrypted.

You can also order as a guest.

However, an account offers you a few benefits:
You’ll receive exclusive early info on new products, can order faster and more conveniently, and keep track of current and past orders.

If you have a voucher/discount code, you can enter it directly in the cart.

The outstanding images are by Benjamin Dütschler (aka Benj). We would like to express our sincere thanks to the talented photographer, who always impresses us with his ingenious ideas and their implementation.

Don’t hesitate to contact him: **@*******en.ch