Neleus Men's Compression Baselayer Athletic Workout T Shirts 85% Polyester / 15% spandex, Machine Washable Made in USA or Imported Elastic closure Order usual size for Compression Fit; Order one size smaller than usual wear for Extreme Compression Fit Non abrasion fabric material with excellent elasticity and durability Train hard and stay dry in this lightweight men's short-sleeved training shirt Dri-FIT Max fabric & Moisture Transport System wicks sweat & dries fast Suitable for all seasons (training, baseball, basketball, soccer, American football, NFL, Squat, weight training, cycle, yoga, rashguard, skiing, snowboarding, all weather sports)