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 40246 Airy, Warm and Breathable Fabric - 100% recycled polyester jacquard fleece with hollow-core yarns wicks moisture, dries fast and is highly breathable for cool-weather activities; with a slim fit Lightweight and Compressible Zigzag Knit -Zigzag-knit pattern increases airflow and minimizes bulk for breathable, compressible performance Offset Shoulder Seams - Off-shoulder seams sit comfortably under pack straps Pocket Features - Zippered left-chest pocket for stashing small items Soft Cuffs and Hem - Quick-drying woven binding at the back hem and cuffs for improved fit and durability Zip-Neck Design - Quarter-zip for added venting and easy layering