Grape — From the vine to your feet

The world of wine generates millions of litres of wine every year… but also tonnes of by-products. Skins, seeds, residues: a dense organic material known as grape marc. At Zèta, we do not see this as an end, but as a beginning.

A material born from agricultural co-products

Every pair in the Alpha collection relies on this innovative material, developed in Milan from upcycled grape marc. Following vinification, the grape marc is dehydrated and ground into a fine powder. This powder is then combined with a water-based PU to create a supple yet resilient paste.

Spread over a recycled polyester fabric, this paste forms the upper of our trainers. A smooth, stable finish with a delicately textured feel. Everything is then cut and assembled by hand by our artisans.

A sustainable material, without compromising on performance

The final composition includes 55% grape and 45% water-based PU.

The lining is made from 100% recycled polyester.

Yet what matters as much as the recipe is the result: a material that is not merely eco-responsible, but built to last. It is supple, easy to care for, and retains its shape over time.

Clear guarantees on quality

This material is certified by recognised independent bodies:

PETA, OEKO-TEX® STANDARD 100, GCA (Global Change Award), as well as ISO 14001 (environmental management), ISO 9001 (quality management) and ISO 45001 (occupational health and safety) standards.

These certifications back up our commitment: producing differently, with uncompromising standards.

Making an impact, quietly

Working with grape marc is a practical way to make the most of what already exists.

This reduces reliance on virgin resources, while offering a technical and credible alternative to petroleum-based or animal-derived materials.

An agricultural co-product, minimal processing, genuine everyday use.

It is as simple as that.