Craft Women's Active Extreme Concept Piece Long Sleeve Baselayer 100% Polyester Imported Concept that merges body mapping with sport-specific fit solutions Thin, lightweight, and elastic fabric that is channel -knitted with two high-tech polyester fibers. A hexa-channel fiber helps moisture transport Flatlock seams that follow body movements Bodymapped mesh superlight Superb quick-dry effect Craft is the official apparel and footwear sponsor of Spartan Race