X-Mountain Spirit Men's Warm Breathable Comfortable Base Layer Suit Underwear 65% Polyester(Bamboo) / 27% Nylon / 8% Spandex Imported Waterproof and Windproof Raglan Sleeve,Jaquered textured crew collar to help reduce rub bobbling Wicking, Compression, Breathable, Lightweight,Warm Hand-wash only Made in China