Sometimes, a vest is just the dose of extra insulation you need. Especially when you’re moving fast in cold conditions.This ultra-lightweight model will keep you warm, but never overheated. It features a body mapped construction which provides GORE-TEX INFINIUM™ WINDSTOPPER® weather protection in key areas without compromising breathability or freedom of movement. It’s insulated with Polartec® Alpha® which has excellent thermal management and moisture-wicking properties.