Fit & Design: ZoneKnit(TM) - Engineered body mapped technology to regulate your body temperature and let your skin breathe during high-intensity activity Cool-Lite(TM) - A lightweight and breathable fabric blend Raglan sleeve construction for mobility Gusseted underarms for mobility and comfort Thumb slits keep your sleeves in place and hands warm Flatlock seams to prevent friction Drop tail hem for added coverage Additional Details: Machine wash