CLSL TM-S17-OLCZ_Medium Tesla Men's Compression Shorts Baselayer Cool Dry Sports Tights S17 87% polyester We strongly recommend ordering ONE size up what you normally wear. TeslaGears S17 designed for all seasons (Releases heat and wicks moisture with a cooling effect) 87% Polyester-13% Spandex- Compression wear "No Fly opening" Non abrasion fabric material with excellent elasticity and durability Moisture Sensing/Quick time Dry/TWO-WAY Air Circulation. Anti-microbial deodorization fabric for odor control