Previously known as the Atom AR Hoodie, the freshly revamped Arc’teryx Atom Heavyweight Hoodie offers twice the Coreloft insulating warmth as the regular Atom while still maintaining that same extremely comfortable, wind-resistant, and quiet Tyono material. Complete with an insulated, helmet-compatible hood, Permeair side panels, and stretch-woven cuffs, the new Arc’teryx Atom Heavyweight Hoodie retains its title as one of the best darn midlayer (or standalone!) jackets that money can buy.