American Apparel Womens/Ladies Plain Tri-Blend Racerback Tank/Vest Top Polyester, Cotton, Rayon Tank top with generously cut arm openings and a slim racerback in our ultra soft tri-blend fabric. Polyester retains shape and elasticity, cotton lends comfort and durability, and rayon makes for a unique texture. Fabric: Tri-Blend 50% Polyester, 25% Cotton, 25% Rayon. Weight: 125gsm. Sizes: Sizes: XS, S, M, L (0, 0-2, 4-6, 8-10).