Grape — From the vine to your feet

The world of viticulture produces 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 don't see it as an end, but as a beginning.

A material born from an agricultural by-product

Every pair from the Alpha collection is built on this innovative material, developed in Milan from upcycled grape marc. After the winemaking process, the marc is dehydrated and then ground into a powder. This powder is then blended with a water-based PU to form a supple yet resistant paste.

Spread over a recycled polyester fabric, this paste becomes the upper of our trainers. A matte, stable surface with a slightly textured feel. Everything is cut and assembled by hand by our craftspeople.

A responsible material, with no compromise on performance

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

The lining is made from 100% recycled polyester.

But what matters as much as the recipe is the result: a material that is not simply eco-responsible, but one that stands up to real use. It is supple, easy to care for, and holds its shape over time.

Clear quality guarantees

This material is certified by recognised independent bodies:

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

These certifications support our commitment: to produce differently, but seriously.

Making a difference, quietly

Working with grape marc is a concrete way of making use of what we already have.

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

An agricultural by-product, minimal processing, real-world use.

It really is that simple.