Carhartt Men's 102052 Force Extremes&trade; Sleeveless T-Shirt 60% polyester 4.7-ounce, 60% polyester/40% Cocona&reg; 37.5&trade; polyester Relaxed Fit FastDry&reg; with 37.5&trade; technology dries fast to keep your body at its ideal temperature Stain Breaker&reg; technology releases stains Rugged Flex&reg; technology for ease of movement