NIKE Mens Ko Flash Pullover Training Hoodie Royal Blue Imported Nike KO Flash Pullover Men's Training Hoodie is made with brushed Therma-FIT fabric for warmth and comfort. Therma-FIT fabric keeps you warm by blocking out cold. Mesh-lined hood for warmth and breathability. Kangaroo pocket provides easily accessible storage. Rib cuffs and hem for a snug, comfortable fit. Side and underarm insets for enhanced range of motion. Therma-FIT 100% polyester.