HIGH-PERFORMANCE SPORT FABRIC: 47% CATION, 47% POLYESTER,6% SPANDEX. The fabric is specially designed for sport with 4 salient features: (1)Moisture Wicking & Quick Dry, keep you dry all the time; (2)Ultra-soft and Skin-friendly, no pain of friction during exercise(3)Light Weight and Breathbalegreat for exercising or as an undershirt; (4)High Elasticity, have a 4-way stretch for freedom of movement.These characteristics make this t-shirt highly desirable for working out.