This strawweight champion of warmth knows it doesn't take a heavyweight to be a heavy hitting heater. Teeny, tiny Primaloft® fibers warm better and compress smaller than any other synthetic fiber. So we stay warmer with less weight and less bulk. Plus, Primaloft keeps on warming, even when wet. Windproof, water-resistant and it weighs just under 10 oz. 100% recycled poly shell. XS(2), S(4-6), M(8-10), L(12-14), XL(16). XS(2), S(4-6), M(8-10), L(12-14), XL(16).