NRS WaveLite Union Suit - Polartec - Men's Polartec Power Stretch fleece: 49% Polyester-velour, 38% Nylon, 13% Spandex Form-fitting design allows layering without the added bulk of other mid-weight clothing Quick-drying Polartec Power Stretch fleece is wind and abrasion resistant and wicks moisture away Soft and amazingly warm, it will keep you toasty inside your dry gear, ski clothes or sleeping bag Double-pull zipper with protective inner flap and double-stitched seams will withstand years of use