This is the one layer you don't have to keep taking off and putting on all day. That's because it actually adapts to the temperature, keeping you warm when it's cool, but letting out extra heat as the day gets going. UA Storm technology repels water without sacrificing breathability. Lightweight, warm spacer fabric through sleeves, back and centre for stretch and mobility where you need it most. Strategic woven overlays for wind protection with Armour Fleece® lining for added warmth and comfort.