i wanna be like mike !!!! The specially spun fibers provide a smooth surface for premium printing vividity and sharpness. No side seams mean there are no itchy interruptions under the arms. The shoulders have tape for improved durability. .: 100% cotton (fiber content may vary for different colors) .: Medium fabric (5.3 oz/yd² (180 g/m²)) .: Classic fit .: Tear-away label .: Runs true to size