70% Nylon 25% Cotton 5% Spandex, Machine wash. We received few feedbacks from customers that they fit too small, please choose 1 size bigger than you usually wear. Sorry for the inconvenience caused. Soft wide logoed mercerized waistband (1.9") brings an elegant metallic highlight to these briefs without binding and pinching. 3D convex pouch with smooth flatlock seaming for more charm and comfort, double lined cotton in the crotch with breathable mesh back.