Quick Dry Fabric: 94% Polyester and 6% Spandex. Lightweight, breathable,quick dry and elastic. Moisture Wicking: With excellent moisture-wicking, This sleeveless shirts will keep you dry during your gym workout. 4-Way Stretch: Men tank tops is elastic fabric, comfortable to wear while running, easy to stretch. Side Slit: The side slit design enhances the flexibility of movement, making fitness and exercise very easy. Perfect for: Running, workout, gym, training, exercise, fitness, yoga, basketball, hiking, swimming, etc.