Waterproof, seam-taped nylon HyVent Alpha shell. * PrimaLoft One insulation is warm even when wet. * Mapped PrimaLoft One insulation levels to provide the greatest warmth to packability ratio possible. * Sleek, fixed, fully adjustable helmet-compatible hood swivels with head for a natural, unobstructed view. * Zip handwarmer pockets are generous and easy to access.