Alo Sport Ladies Bamboo Long-Sleeve T-Shirt. W3004-BLACK/SLATE-2XL 67% bamboo lyocell, 29% cotton, 4% spandex jersey Contrast thread at bottom hem and sleeve cuffs Bamboo has properties that wick moisture and are anti-bacterial Bamboo has properties that are hypoallergenic Bamboo has properties that are breathable w/no added chemical treatments