Core warmth is key when you’re dabbling in the mountains and the Rab Microlight Vest provides some of the most reliable warmth yet. A perpetual best-seller, the Microlight Vest is insulated by hydrophobic 700 fill-power recycled down that’s housed within a durable yet lightweight Pertex Quantum nylon ripstop outer fabric. Pack it into the included stuff sack and stash it in your pack.