The Rab Women's Cirrus Flex 2.0 Insulated Vest proves that a bit of core warmth can go a long way. Whether you're climbing, ski touring, or trekking, this packable vest warms your core with synthetic insulation that mimics down for a light and lofty feel that actually stays warm if it happens to get wet. The windproof Pertex Quantum shell has a fluorocarbon-free DWR treatment to bead raindrops and snowflakes off the fabric's surface. Stretchy side panels provide freedom of movement and a solid fit that you can wear off the mountain, too. The hem has a cinch-cord that helps the vest stay put even when paired with a climbing harness or backcountry backpack. The Cirrus Flex 2.0 Vest is so packable that you can stuff it in its own pocket, and there's a loop for clipping it to your harness. Like all apparel in Rab's Cirrus range, this vest was made mostly out of recycled materials for an environmentally thoughtful design.