Dial in your existing layering systems or invent an entirely new one with the compressible, featherlight Nano-AirA(R) Ultralight Pullover. This stretchy and ultrapackable insulated layer is built for cool, high-output days when you need breathability and just a touch of warmth to stay in your sweet spot for longer. Made in a Fair Trade Certified(TM) factory. Specs Stretchy, Breathable, Weather-Resistant Fabric Shell and lining fabric is made from 100% recycled polyester ripstop with mechanical stretch, exceptional breathability and improved abrasion resistance, and treated with a durable water repellent (DWR) finish made without intentionally added PFAS to shed light moisture Featherlight FullRangeA(R) Insulation Light, breathable and stretchy 20-g FullRangeA(R) insulation provides featherlight warmth through the shoulders, outer arms, and front and back body; uninsulated underarm panels vent heat and reduce bulk Technical Fit Slim fit is built for comfort under a harness and a backpack, and articulated patterning provides exceptional range of motion Two-Way Zipper Deep, two-way, center-front zipper allows venting, with a smooth, low-profile zipper garage for next-to-skin comfort Self-Stuffing Chest Pocket Low-profile, generously sized, vertically zippered chest pocket keeps essentials warm and close at hand; pullover easily self-stuffs into it, with a carabiner clip-in loop Moisture-Wicking, Stretchy Cuffs Stretchy, soft, moisture-wicking and quick-drying CapileneA(R) Cool Lightweight fabric at the lower arms adds extra stretch to push the sleeves up the forearms Supporting the People Who Made This Product Made in a Fair Trade Certified(TM) factory, which means the people who made this product earned a premium for their labor Country of Origin Made in Vietnam. Weight 218 g (7.7 oz)