The Patagonia Nano-Air Light Hybrid Hoodie is an insulating layer for cold weather pursuits, made with Patagonia’s signature R1 Air fleece panels and FullRange insulation for added warmth. Slim fitting and low profile, this articulated and stretchy mid-layer fits under a helmet or shell with ease. Whether you’re working up a sweat or climbing up a high-elevation face, the The Patagonia Nano-Air Light Hybrid Hoodie is everything you need and more.