ll Lavacore products have a wind-proof middle layer that provides anti-wind chill properties and ensures warmth in cold conditions. The Lavacore Womens Hooded Vest also features: Water resistant outer layer facilitates fast water run-off and quick drying Light weight and 4-way stretch makes Lavacore incredibly comfortable to wear Breathable middle layer allows moisture to be drawn away from the body on the surface Lavacore is neutrally buoyant All seams are overlapped during flatlock sewing to decrease water flow Full gusset incorporated into the underarm to offer exceptional arm movement and stretch Anti-bacterial inner fleece minimizes odor and eliminates bacteria growth Extended material on back to keep vests and shirts from riding up SPF 30+ protection