Researched in a lab, tested on the trails. This jacket has the tech you need to take on frigid miles—down-filled baffles for warmth and AeroLoft perforations for breathability. Stretchy panels help you move with ease and adjustable details let you fine-tune your fit. Dont need the warmth? It packs into the pocket for compact storage. Strategic Breathability:AeroLoft technology places perforations between baffles to vent moisture in high-heat areas.,Down insulation for warmth:Duck down captures warm air between its fine fibres, helping keep the warmth in and the cold out.,Equipped for adventure:A bungee system at the hem and a 2-way zip let you fine-tune your fit. Panels with 4-way stretch help keep your movement unrestricted.,Packable design:Dont need the warmth? Pack all 10 ounces (284g approx) of this jacket into the internal pocket for easy storage.