Atom Heavyweight Hoody - Review 2025

Previously known as the Atom AR Hoody, the Atom Heavyweight Hoody is the warmest piece in the Arc’teryx Jacket Atom lineup, and not only serves as a stellar mid-layer but can be worn as a stand-alone piece in the right conditions.

Coreloft™ synthetic insulation not only provides warmth but is breathable, lightweight, thermally efficient, and compressible. The outer layer is made of Tyono™ 30, a fabric that is lightweight yet durable and wind resistant. Additional breathability is achieved through Permeair™ 20, a more permeable fabric installed underarm, providing improved temperature regulation.

From keeping you warm on a chilly day skiing to kicking around town with your friends, the Atom Heavyweight Hoody is your new best pal. The synthetic insulation provides warmth that is reliable even in damp conditions (think PNW) but doesn’t take up too much valuable real estate in a pack that might already be bursting at the seams.

We recommend this piece to those who are looking for a quiver killer of jackets. An ideal candidate for skiers and snowboarders alike who are looking for a layer to provide reliable warmth on a long day out. For those who run warm, check out the Atom Hoody.