What Our Gearhead(R) Experts Are Saying: "This vest is always in my pack-whether I'm hiking, biking, or just layering up for a chilly morning. It's warm without bulk, super compressible, and I love that it's made from recycled materials with low-impact insulation tech. It does everything a synthetic vest should do, and better." We turn to the Nano Puff Vest when the weather is in-between and weight matters. Patagonia's iconic insulated vest offers just the right amount of warmth for layering, thanks to 60g of PrimaLoft(R) Gold Insulation Eco-crafted from 100% postconsumer recycled polyester using reduced-emission P. U. R. E.(TM) technology. It stays warm even when wet and packs down into its own pocket for ultralight travel. The shell and lining are both made from 100% recycled polyester ripstop with a PFAS-free DWR finish to shed light moisture and block wind. Brick quilting stabilizes insulation for long-term durability, while the drop-tail hem, storm flap, and zippered handwarmer pockets round out a thoughtful design built for fast-moving days in the mountains or the city. Fair Trade Certified(TM) sewn and bluesign(R) approved, it's the vest we wear again and again-for what it does and how it's made.