Lightweight and ultrapackable/the hybridized R1® Vest offers just the right amount of core warmth for high-output days in the mountains. Built from Polartec® Power Grid® fabrics for outstanding stretch and breathability. a Fair Trade Certified™ factory.Workbook FeaturesDurable/stretchy and breathable Polartec® Power Grid® fabric is hybridized with our Capilene® Thermal Weight baselayer fabric to reduce bulk and make this lightweight layer even lighterHybrid design boosts warmth around your chest and shoulders/while improving back and underarm breathability and venting extra heatFabrics offer outstanding stretch and increased mobilitySlim fit with a center-front zip and a low-profile zipper garage at the chin for next-to-skin comfort; a low-bulk hem allows easy layeringLow-profile shoulder seams offer chafe-free comfort under a packZippered left-chest pocket with a mesh pocket bag for breathability a Fair Trade Certified™ factory/which means the people who made this product earned a......