Patagonia R1 Air Zip Neck The R1 Air Zip-Neck is a lightweight, breathable and quick-drying technical fleece for high-exertion activities in cold conditions. Fabric is made with 100% recycled polyester and is structured for comfort during movement. Fair Trade Certified sewn. Slim Fit - Item 40245 * 100% recycled polyester jacquard fleece with hollow-core yarns features a unique zigzag texture that wicks moisture, dries fast and is highly breathable for high-output activities * Off-shoulder seams sit comfortably under pack straps Left-chest pocket for easy stashing of small items; minimal bulk makes for a great layering piece * Quick-drying woven binding at the back hem and cuffs for added stretch and improved fit * Half-zip for added venting