S, M, L, XL - Men's ringer tee made of 4.7 oz. 46% Bamboo Charcoal, 54% Polyester. This blend of pliable and comfortable bamboo on your skin (naturally dry wicking and naturally anti-bacterial) and polyester mesh on the exterior means you have a tee shirt with fashion and function. Great looks and great performance for the active male. Made in the USA.