As soon as you put the Diablo Down Jacket on you won't want to take it off. Stuffed with 700-fill of insulating, responsibly-sourced down, it delivers welcome warmth with lightning speed. Plus elasticated cuffs and an adjustable hem lock in body heat. It's pretty hardy too, thanks to the ripstop face fabric. Layer it over a shell when taking a well-earned rest or wear it over a midlayer on dry but cold days.