January 26, 2021


The Atom SL Hoody redesign improves on an Arc‘teryx icon while remaining the same focused and functional hoody so many have grown to love. Upgrades for Spring 21 include the addition of an Anorak version of the SL Hoody as well as a completely revamped materials package with Tyono™  20 shell material that allows for airflow during your active periods but helps cut the chill when you slow down. Vegan friendly Coreloft™  Compact insulation ensures improved packability that insulates if wet, delivering superior performance for super little weight.


Designed for the changing seasons when you need warmth but can do without the bulk, the Atom SL employs only necessary features and ultralight fabrics. Created to be so compact and light there’s no reason to leave it behind, the Atom SL is an efficient midlayer in cool conditions and a great standalone during rest breaks. The Atom SL warms you up like a lightweight fleece but for significantly fewer grams. This is the piece you need for those early morning starts, or while enjoying the view from a freshly bagged peak.


  • Completely updated fabric package includes Tyono™  20 exterior shell
  • Packable Coreloft™  Compact insulation is strategically placed at the chest and back
  • Low profile, uninsulated Storm Hood™  can now be stowed with a button

Sleeves are lined with a comfortable mesh, and lightweight stretch fleece side panels help provide thermal performance and ventilation. Articulated sleeves and gusseted underarms extend freedom of movement. The Tyono™  20 outer material balances airflow with wind resistance and has a DWR finish to repel moisture. The No Slip Zip™ works like a series of speed bumps to keep the main zipper from self-opening.


Primary Use:  Multiple activities

Fabrics:  Tyono™  20, 100”/o nylon exterior shell | Coreloft™ Compact 40g/m2 insulation |

bluesign®Approved Stretch Fleece Side Panel - 93% Polyester, 7% Elastane | Dope Permair™  20, 100% nylon lining (select

colors) | Perm air™  20, 100”/o nylon lining (select colors)

Weight:  235g/8.3oz (Women’s Small) | 270g/9.5oz (Men’s Medium)