Insulation works by trapping warm air close to the body — using synthetic fill that performs even when damp, dries fast and packs down smaller than you'd expect. At the lighter end of the range, packable jackets and vests slot between a mid layer and outer layer when the temperature drops and a fleece alone isn't enough. At the heavier end, fully waterproofed options are substantial enough to serve as standalone outer layers on the coldest, wettest days going.
The Geyser Waterproof Insulation Jacket sits at the top of the range — a men's waterproof insulated jacket in seam-sealed nylon canvas with Primaloft® Black fill, rated to 20,000mm and built for the days when cold and wet arrive at the same time. One jacket. No compromises.
