Novices and experts alike all love the Nano Puff Vest for it's featherlight weight and surprising warmth. Patagonia's Nano Puff collection continues to offer excellent warmth to weight ratio with PrimaLoftR Gold insulation for excellent compressibility and versatility. Whether wearing it around town on a chilly day or layering under a shell as a mid layer, the Nano Puff Vest surpasses expectations of a lightweight mid layer. Made of recycled polyester, the shell fabric has a DWR durable water repellent finish and a brick quilting pattern to stabilize insulation. Features: Lightweight ripstop recycled polyester shell fabric has a DWR durable water repellent finish The most thermally efficient synthetic insulation available water repellent, compressible 60 g PrimaLoftR Gold insulation has excellent warmth to weight ratio and maintains 96% of warmth, even when wet Brick quilting pattern with horizontal quilt lines on side panels stabilizes insulation and uses durable thread for abrasion resistance Center front zipper has wicking interior storm flap and zipper garage at chin for next to skin comfort Two zippered hand warmer pockets have cleanly finished zipper garages zippered internal chest pocket doubles as a stuff sack with a reinforced carabiner clip in loop Drawcord adjustable drop tail hem seals in warmth Weight: 227 g 8 oz Regular Fit Materials: Shell and lining: 1.4 oz 22 denier 100% recycled polyester with a DWR durable water repellent finish. Insulation: 60 g PrimaLoftR Gold Insulation Eco 100% polyester 55% post consumer recycled content. Fabric is bluesignR approved.