XSHANG Mens Camo T Shirts Comfort Soft Fitness Stretchy Crew Neck Tee 5% spandex 95% Cotton/ 5% Spandex Original Xshang Brand, Professional Sport Tank Top and T-shirt manufacturer. Suit for casual/sports wear(gym athletic), Stretch-fit Fitness and elastic, close-fitting PLEASE read the size chart in the detailed picture on the left carefully, not the ones by Amazon on the side of the item that you click, if you are not sure of the size, ONE SIZE UP is a good idea