Patagonia Nano-Air Vest

Get core warmth without bulk: This light-as-air vest is so comfy you’ll wear it for days on end, under and over other layers. We found it useful in almost every scenario, from 60°F fall hikes to chilly Vermont ski tours. Its success comes from a trim fit (for warmth) combined with unparalleled elasticity. The ripstop nylon shell has four-way mechanical stretch (no Lycra, which ups weight and slows dry time), and Patagonia’s FullRange synthetic fi ll also stretches. Plus, it packs to so ball size. $199; 6.8 oz. (w’s S); patagonia.com