Icy runnels up high, sun-warmed rock down low: springtime means sendin’ temps. Whatever your preferred medium, core warmth matters and our Nano-Air Vest® keeps pace throughout high-output, stop-and-go missions in variable conditions. Its stretchy and highly breathable fabric package integrates the qualities of fleece, soft shell and puffy by combining a plain-weave liner; warm-when-wet FullRange™ insulation; and a lightweight-yet-durable, weather-shedding 100% nylon ripstop shell with DWR (durable water repellent) finish so you can put it on and leave it on. The vest’s incredibly soft, supple feel and full mechanical stretch allows for a close, athletic fit over baselayers and an uninhibited range of motion. The left-chest pocket and two handwarmer pockets all close with trim, low-bulk zippers. The center-front zipper has a storm flap and zipper garage, while stretch binding at the armholes and a dual-adjustable drawcord hem seal in warmth.