Extremely light and packable, Patagonia builds their technical R1® Air fleece with hollow core yarns and a lofted zig-zag texture to trap air, move moisture and breathe for exceptional warmth without weight during high-exertion, non-stop activities in cold conditions. ade from 100 % recycled polyester with hollow-core construction, R1® Air has a clean, athletic design for easy layering and a Z-structure inside and out that dissipates moisture quickly for fast drying, highly breathable warmth. Light, airy and minimally designed, it feels soft and forgiving on the skin and can be worn as a stand-alone top when conditions permit. Details include off-shoulder seams that sit comfortably under your pack straps, a simple cuff and hem design with a quick-drying binding that adds wrist comfort, a left-chest pocket for stashing your essentials and HeiQ® Fresh durable odour control so you stay welcome among friends at the end of the day. Fair Trade Certified™ sewn, which means the people who made the R1® Air Crew earned a premium for their labour. FeaturesLightweight, Breathable, Technical Fleece FabricHollow-core fabric with a unique zigzag texture wicks moisture dries fast and is highly breathable for high-output activities, with HeiQ® Fresh durable odour controlOffset Shoulder SeamsOff-shoulder seams sit comfortably under pack strapsZippered Chest PocketLeft-chest pocket for an easy stash of small items, minimal bulk makes for a great layering pieceSoft Cuffs and HemQuick-drying woven binding at the back hem and cuffs for added stretch and improved fitFair Trade Certified™ Sewn