Nike Mens Golf Therma-fit Pullover Cover Up 100% Polyester Mock neck that zips up to the chin for custom coverage. Brushed interior for warmth and comfort. Side pockets for storage. Fabric: Body: Therma-FIT 100% polyester. Machine wash. Mesh side panels for enhanced breathability. Rib cuffs and hem for enhanced fit. Therma-FIT fabric to help keep you warm and insulated.