Up for anything. We needed a jacket for going up. Something to keep you comfortable while you’re walking uphill, no matter what kind of crazy mountain weather is happening. So we made the Up Jack. It cuts the wind, sheds moisture, and breaths like you’re wearing nothing at all. The soft, airy texture of our Japanese nylon never feels clammy, and has just enough stretch to flex to your every movement. You won't find a more comfortable solution for your uphill alpine adventures, nor will you find a jacket that you want to wear more. MATERIAL 100% Japanese nylon 34 denier, air-textured ripstop 100% windproof + water-resistant PFC-free DWR coating FEATURES 1/2 zip for easy access + extra ventilation Athletically articulated fit throughout Raglan sleeves Zippered chest pocket on the left side, which doubles as a storage bag Large, double-entrance kangaroo pocket Internal elastic on the hood for streamlined fitting under or over the helmet Elastic wrist cuffs + hem details Packs down the size of a tall boy! Weight: 6.7 oz (size Medium)