Yoga Clothing For You Mens Performance Sleeveless Tee Shirt This revolutionary mens tshirt offers a super-smooth surface, superb shrink resistance and a softer, more comfortable feel White, Black, Red, Royal and Navy are 100% cotton. Ash & Athletic Heather are 90% cotton/10% polyester Generous arm openings for superb mobility "Yoga Clothing for You" guarantees your satisfaction on every purchase!