●We strongly recommend ordering ONE SIZE LARGER than your normal size. Please remember, Compression clothing is meant to fit tight. unlike a normal shirt. Sizing is also unique ●Material : 92% polyester-8% Spandex, EX-T02 (Mock) designed for all seasons ●UV Protection(UPF +50) / 4 Way Full Stretch - Excellent elasticity with enhanced range of motion ●Quick and Dry Transport System (Temperature / Moisture Control) - Wicks Sweat away from the body, keeping you cooler and drier ●Non abrasion fabric material with excellent elasticity and durability