S, M, L, XL - Men's crewneck bamboo tee made of 4.8 oz. 70/30 Bamboo/Cotton (30 singles). We took a staple item and made it extraordinary. If you've never felt the softness of bamboo, you are missing a luxurious feel that is also naturally dry wicking and naturally anti-bacterial. The softest tee shirt you will ever wear. Made in the USA.