Ultra-light, compressible and warm, the Patagonia Micro Puff Vest is your most valuable weather arsenal for keeping your core firing and maintaining your cold-weather sanity. When it comes to alpine shiver-fests and incoherent mumbling, it's a no-brainer to throw this high-loft vest into your pack to ward off the zombies. Designed with durable and amazingly efficient 100-g PrimaLoft One synthetic insulation, the Puff Vest traps heat even when wet, while its DWR (durable water repellent) 100% all-recycled polyester shell (1.5-oz 32-denier; lining is 1.4-oz 22-denier) blocks wind and sheds snow. Two hand-warmer and one interior zippered chest pocket that doubles as a stuff sack (with a carabiner clip-in loop) offer convenient storage for essentials. This Patagonia vest is recyclable through the Common Threads Recycling Program.