ColdGear Reactor intelligent insulation adapts to any activity for non-stop comfort & total versatility. Lofty insulation with a unique quilting pattern that traps heat, but still allows air to flow so you don't overheat. UA Storm technology repels water without sacrificing breathability. Smooth, ripstop woven fabric is lightweight & extremely durable. Generous funnel neck collar with adjustable drawcord. Secure, zip hand pockets. Ribbed cuffs, hem & collar detail.