The shorts are made of a soft, lightweight and flexible material, 100% polyester. Perfect for athletes training BJJ, MMA and other martial arts. The waistband has an internal drawstring and velcro closure. Sublimation printing technology is used to ensure that the print won’t crack or come off. 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.