Designed for running and training. Seamless collection: chafe-free, breathable, moisture-wick and four-way stretch. Slim fit, waist length. Mesh ventilation detailing under the arms and back keeps you cool while you work out. Thumbholes keep sleeves in place for better coverage and protection of your hands. Seamless collection of smooth, soft knit fabric is designed to help reduce chafing, encourage ventilation and wick away sweat to help you stay dry. Designed for running and training, gives you a better workout. Breathable mesh is placed in high-sweat areas to keep you cool and ventilated during your workouts. Proper length to the waist, the sweatshirt features thumbholes and a slim fit for comfortable movement. Feature & Fitting: Seamless Collection Design for yoga or training Waist length, slim fit Mesh ventilation and thumbholes Fabric: Fast sweat-wicking keeps you dry Minimal seams to reduce chafe Four-way stretch, good elasticity, no sense of restraint 1) 96% Polyamide, 4% Elastane; 2)Heathered: 51% Polyamide, 45% Polyester,4% Elastane