Perfect for athletes training BJJ, MMA and other martial arts. The rashguard is made of a 85% RPET polyester and 15% spandex fabric blend. Recycled Pet Fabric (RPET) is a new type of fabric made from yarn of recycled PET bottles. Please read size guide and washing instructions below. If you have any questions, please contact customer service . Also read the Rebelz Ultimate No-Gi Guide for advice and tips.