American Apparel Tri-Blend Short Sleeve Women's Track T-Tri-Indigo Form-fitting Durable rib neckband Tri-Blend (50% Polyester / 25% Cotton / 25% Rayon) construction Polyester retains shape and elasticity; Cotton lends both comfort and durability; addition of Rayon makes for a unique texture and drapes against the body for a slimming look superior screenprinting results