The Nano Puff® from Patagonia is the epitome of innovation and convenience, seamlessly blending cutting-edge features with the timeless quality the brand is known for. Crafted from a lightweight and durable 100% recycled polyester ripstop shell and liner, this backpack boasts the most thermally efficient synthetic insulation available – the 60-g PrimaLoft® Gold Insulation Eco, which is not only environmentally conscious but also water-repellent and highly compressible. The brick quilting pattern adds durability, while the wicking interior storm flap ensures next-to-skin comfort. Smart storage solutions include two zippered hand-warmer pockets, an internal chest pocket doubling as a stuff sack, and a reinforced carabiner clip-in loop. With a drawcord-adjustable drop-tail hem for customizable warmth, this backpack is both functional and sustainable. The 283g (10 oz) weight, coupled with blue sign® approval, reflects Patagonia's commitment to providing an eco-friendly and high-performance outdoor companion.