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, or Totem Cams. Other exclusions may apply
© 2025, Ascent Outdoors
Follow us on Instagram (@ascent.outdoors)
to see our latest adventures,
plus events & announcements.
