Different by design. Lightweight and svelte, replete with curvaceous quilting, the Slipstream delivers the knockout blow to Old Man Winter. Carefully designed by folks at Kuhl with all the finest materials: gossamer-weight stretch nylon and 800 fill down. A slip of a jacket that packs on the BTU's without piling on bulk. Water-repellent finish so we stay super heated even in a drizzle. Inner zip security pocket. One arm, two front zip pockets. XS(2), S(4-6), M(8-10), L(12), XL(14).