The Boulder Hoodie is a superbly warm mid-layer fleece made from Polartec Thermal Pro, a high loft deep pile fleece with air permeability making it extremely breathable. The Boulder Hoodie works best under a water/wind proof outer shell as it is not at all windproof. The Boulder offers incredible levels of warmth thanks to the air trapping capabilities of the high loft fleece; it works just like animal fur, trapping a layer of warm air next to your body. The lightweight synthetic fibres also wick moisture away so the Boulder Hoodie works perfectly as an insulating mid layer during active pursuits & dries exceptionally quickly. All seams are flat locked for extra durability & the low profile hood is designed to fit snugly under a climbing helmet or just add extra insulation if its really cold. The hood also acts to keep the back of your neck warm when its not over your head. The Boulder Hoodie is about the best performing mid layering fleece that can also be used as a fabulously warm après activity or cosy leisure jacket. Polartec Thermal Pro textured High Loft fabric Lycra bound under-helmet hood YKK front zip with chin guard Flatlock low bulk seams 2 x YKK zipped handwarmer pockets Hem drawcord Regular fit