The superlight (SL) version of their iconic mid-layer, the Arc'teryx Atom SL Anorak features a packable design that can be stowed within its own chest pocket. With 40g Coreloft™ insulation for efficient warmth while still maintaining a low profile, the Atom SL Anorak is the ultimate summer layer that takes up minimal space in a pack, yet offers just the right amount of insulation to let you enjoy those dreamy summer evenings.