NIKE Flex 8" Black Mens Training Shorts 100% Polyester Designed with Hydra Void technology that sheds water to keep you dry, stretch-woven fabric for excellent range of motion and laser perforations to keep you cool Two front pockets for convenient storage Rectangular mobility gusset for range of motion The DWR (durable, water-repellent) finish shields you from the elements and helps keep you dry in wet conditions The vented perforated panels enhance ventilation and range of motion