100% cotton. Premium Short Sleeve fit, ¾” set-in collar, double-needle bottom hem and sleeves, with shoulder-to-shoulder tape. Pre-shrunk to minimize shrinkage. Specs: Body Width: S=18", M=20", L=22", XL=24", 2XL=26", 3XL=28" 6.0 oz 100% cotton tubular jersey. Classic fit, double-needle bottom hem and sleeves, with shoulder-to-shoulder tape. Preshrunk to minimize shrinkage. Body Width: 4XL=30", 5XL=32", 6XL=34"