85% Polyester, 15% Elastane Pull On closure [Materials] Mix of Polyester & Spandex fabric is excellent elasticity and durability. It is suitable for various sports such as running, baseball, basketball, soccer, football, bjj, gym training, and other active workouts. Perfect for Working Out, Running, Jogging, Basketball, Exercise & all other sports. (Great Compression Shirt - Size down 1 full size for compression fit) **Washing Tip : Wash separately before wearing**