Patagonia Men's Nano Puff Hybrid Jacket Shell: 1-oz 15-denier 100% recycled polyester. Insulation: 60-g PrimaLoft ONE 100% polyester (70% recycled). Lining: 1.4-oz 22-denier 100% recycled polyester. Shell and lining have a Deluge DWR (durable water repellent) finish. Venting: 6.1-oz Polartec Thermal Pro 98% polyester (63% recycled)/2% spandex Lightweight recycled polyester ripstop shell with a Deluge DWR (durable water repellent) finish protects; 60-g PrimaLoft ONE keeps you warm; Polartec Thermal Pro vents excess heat to keep the body temperature perfectly regulated Microfleece-lined neck and chin for comfort Polartec R2 fleece has exceptional warmth-to-weight ratio, and is compressible and breathable with stretch in critical areas Pockets: Two napoleon chest pockets are harness and pack compatible Unique quilt pattern holds insulation in place, which provides excellent warmth and compressibility