What Our Gearhead® Experts Are Saying:"This hoody's my go-to for everything-cragging, skinning, even around town. It stuffs down tiny but still blocks wind and keeps me warm when the sun drops. I always keep one clipped to my harness or stashed in the pack."We count grams when we pack, but never compromise on performance. That's why the Nano Puff Hooded Insulation Jacket remains a mainstay in our alpine layering system. Whether we're climbing granite spires, booting up couloirs, or navigating windy ridgelines, this jacket delivers the right amount of lightweight insulation with surprising weather resistance, all in a packable silhouette that disappears into our bag until we need it. Built with a recycled polyester shell and insulated with PrimaLoft® Gold Insulation Eco, it keeps us warm even when wet and dries fast when the weather shifts. A durable water-repellent finish sheds light moisture, while the brick quilting pattern helps stabilize warmth across high-mobility zones. We zip it up over a base layer on chilly belays or throw it under a hardshell when the conditions turn technical. For ultralight adventures where weight and warmth go hand in hand, the Nano Puff always earns its keep.