Hanes Men's ComfortBlend EcoSmart Crewneck T-Shirt, Smoke Gray 5% polyester Fiber Content: "50% Cotton / 50% Polyester, 5.5 oz" Durable double stitching reinforces neck, sleeves, and hem. ComfortBlendTM jersey fabric combines 50% cotton/50% polyester, specially knit for softness. Lay Flat Collar stays flat, keeps its shape...guaranteed!