Three knitwear pieces featuring Spiber’s Brewed Protein™ fiber from the Stella McCartney Winter 2026 Collection, first presented during Paris Fashion Week in March this year, are now available at Stella McCartney stores, the official online store, and selected retailers.

The items are made from a blend of 25% Brewed Protein™ fiber and 75% RWS-certified wool.
The distinctive properties of fiber derived from Brewed Protein™, which is made through microbial fermentation of plant-derived sugars, help create a soft, delicate feel and refined texture.

We are delighted to have had the opportunity to bring new possibilities for Brewed Protein™ fiber to life through our collaboration with Stella McCartney.

Spiber will continue to explore possibilities beyond conventional materials through innovation, creating new approaches to fashion and the way it is made.

Available at: Stella McCartney stores, the official online store, and selected retailers