Polar Jack's Hz Fleece Properties: Made from 100% recycled Polartec® polyester and featuring a high collar, Jack's Half-Zip Fleece traps body heat and provides lightweight comfort. Perfect for wearing under a jacket for warmth in all weather conditions or on its own as a versatile and easy-to-wear layer. Regular fit ½ length zipper and stand-up collar for extra coverage Lock with logo Material: 100% recycled polyester Polartec®