Mate The Label Organic Stretch Sports Bra in Sage XS The Organic Stretch Sports Bra is for low to medium impact exercise, and stretches for easy on and off (even after a killer arm workout). It's constructed with double-layered fabric and is unpadded while providing coverage and support. Most activewear is notoriously bad for the environment because it's made from synthetic materials that shed microplastics when washed. The Organic Stretch is an entirely different story. While it's impossible to get the necessary stretch for activewear from pure cotton, we got pretty damn close with a blend of 92% Organic Cotton and only 8% Spandex.