Hit the mountain in fast-and-light style with the Rab Men’s Infinity Down Jacket. Yup, chill-crushing 850-fill goose down. Wind is always a factor of mountaineering, and the Pertex outer shell wards off freezing breezes handily while you top out a climb or trek to the summit. Lycra in the insulated hood helps to secure it around your face, and elasticized cuffs lock out cold leaks around your wrists. Rab polished off the Infinity with a short cut and highly-packable design so it stashes into its own, included stuff sack and rides along in your day pack without eating up all the available space.