Yoga Clothing For You Mens Brushstroke AUM Sleeveless Tee 10% polyester Features a stylized version of the sacred OM symbol 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%. Ash & Athletic Heather are 90% cotton/10% polyester Generous arm openings for superb mobility "Yoga Clothing for You" guarantees your satisfaction on every purchase!