Craft Sportswear Women's Active Comfort Roundneck Short Sleeve Base Layer Shirt 70% Polyester/30% Polyamide Imported Lightweight and warming yarn for optimal thermoregulation Excellent moisture transport keeps your body Dry and comfortable Flatlock seams that follow body movements Body mapped with different structures for optimal thermoregulation Seamless design for optimal freedom of movement Craft is the official apparel and footwear sponsor of Spartan Race Lightweight and warming yarn for optimal thermoregulation Keeps you body dry and comfortable by the excellent wicking effect Flatlock seams that follow body movements Seamless design for optimal freedom of movement