The warmest option in the Atom series performs as a standalone or midlayer. Atom Series: Synthetic insulated midlayers. *The Atom Heavyweight Hoody was previously the Atom AR Hoody.
Warm and breathable, wind and weather resistant, packable and durable. Worn as a cold weather midlayer or standalone during rest phases, the Atom Heavyweight Hoody is one of our most versatile insulation pieces. Its Coreloft™ synthetic insulation is efficient, effective and resilient. The light, wind resistant and water repellent Tyono™ 30 shell is treated for extra durability, and Permeair™ panels under the arms improve ventilation. The insulated helmet compatible hood adds warmth and protection.
Versatile synthetic insulated mid layers with a high degree of weather resistance
Man-made insulation with quick dry times, durability and retains warmth when damp.
Versatile high performance designs for diverse activities and conditions.
Size XS, S, M, L, XL, XXL
Weight 475g / 1 lb 0.8 oz
Fit Regular
Model X000007302
Ski, climb, hike, camp, and summit with expert-curated, guide-tested outdoor gear from top brands. Shop online or visit us in Seattle for friendly advice!
Not valid on sale items, Garmin products, Arc'teryx or Totem Cams. Other exclusions may apply.
© 2026, Ascent Outdoors
