EXTREMELY LIGHT AND PERFECTLY STOWABLE. R1® Air is a lightweight, breathable and quick-drying technical fleece for strenuous cold weather activities. The 100 % recycled polyester material is structured for high comfort during active use. Fair Trade™-certifiedPatagonia produces its R1® Air technical fleece with hollow-core yarns and a raised zigzag texture that traps air, wicks moisture and is breathable. This means it offers exceptional warmth without much weight during strenuous activities in the cold. R1® Air is made from 100 % recycled polyester with hollow core construction and has a clean, athletic design for easy layering.The Z-structure inside and out, wicks moisture quickly for quick-drying, highly breathable warmth. It is light, airy and minimally constructed for a soft feel against the skin. It can be worn as a stand-alone top when conditions allow.Details include offset shoulder seams that sit comfortably under the straps of your pack, a simple cuff and hem design with a quick-dry finish for wrist comfort, a left chest pocket to stash your essentials, and HeiQ® Fresh and durable odour control to welcome you among friends at the end of the day. Fair Trade Certified™ sewn, which means the people who made the R1® Air Crew get a fair wage for their work.