Hanes Men's ComfortBlend&reg; EcoSmart&reg; Crewneck T-Shirt, M-Black shirts closure ComfortBlend jersey fabric combines 50% cotton/50% polyester, specially knit for softness. Lay Flat Collar stays flat, keeps its shape...guaranteed! Durable double stitching reinforces neck, sleeves, and hem. Fiber Content: "50% Cotton / 50% Polyester, 5.5 oz"