Arc'teryx Atom Insulated Hoody vs Arc'teryx Atom Jacket

Both are the same jacket family: Coreloft Compact 60 insulation, stretch fleece side panels and a Tyono 20 face fabric. The Atom Hoody adds a hood and comes in a fitted cut aimed at women; the Atom Jacket Men's is a hoodless men's layer with a relaxed-to-fitted fit and a 4.3 rating from 99 owners. Buy the Hoody if you want head coverage for cold starts and belays; buy the men's Atom if you run hot, wear a helmet or shell hood, and prefer a cleaner collar under a pack.

• Choose the Atom Insulated Hoody if you want a hooded synthetic midlayer for hiking, climbing and skiing in cold, damp conditions.
• Choose the Atom Jacket Men's if you want a hoodless, packable men's midlayer that layers cleanly under a shell and a helmet.