The Women's Arc'teryx Atom SV Hoodie is a mid-layer insulator for cold weather on the mountain. The warmest of the Atom line, the SV features Coreloft synthetic insulation to trap heat, keep weight and bulk low, and stay warm even when wet. It's stretchy through the pits to maintain natural movement, so you're unrestricted during activities. A moisture-resistant face fabric and durable water repellent finish keep you drier in light rain. Equipped with a hood and internal cuff gaiters to help you stay comfortable as you head to the summit.