Atom SL Hoody provides core warmth for high-output activities. Designed as Arc'teryx's lightest Atom hoody, it’s built for milder conditions or as a versatile layer. Fortius Air 20 fabric balances weather protection with breathability while stretch side panels improve ventilation. It also sports a StormHood, zippered hand pockets, and adjustable hem. With durable water repellent finish, it sheds light moisture, making it a reliable choice for dynamic pursuits.