ArcTeryx Atom SL Hoody (Nocturne)

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Warm weather is never a constant, even in summer. Fog rolls in, a sudden thunderstorm blocks the sun, and changes in elevation and levels of exposure can cause temperatures to suddenly shift. But  summer conditions seldom require bulky insulation. The Atom SL Hoody is specifically created to hit the zone where insulation is required, but in a measured amount that suits milder conditions. Providing warmth comparable to a lightweight fleece for significantly fewer grams, the Atom SL is an efficient midlayer in cool conditions and a great standalone during rest breaks, early morning starts, and while enjoying the view from a freshly bagged peak.


The Atom SL is designed to handle subtle climate shifts. Balancing air permeability with wind resistance, the shell material allows airflow during active periods, but helps cut the chill during static moments. 40g/M² Coreloft Compact insulation is highly compressible, insulates if wet, and delivers its superior performance for very little weight. All the Atom SL's fabrics are selected to manage moisture and provide comfort while on the move. Sleeves are lined with a comfortable mesh, and lightweight fleece side panels help provide thermal performance and ventilation. Articulated sleeves and gusseted underarms extend  freedom of movement.


Arc'teryx designers know that a thoughtful minimalism delivers more performance. Created to be so compact and light there's no reason to leave it behind, the Atom SL employs only necessary features and ultralight fabrics. Comfortable , easily compacted and resilient, the Tyono 20 shell material uses fine denier yarns that allow a fabric configuration that is surprisingly strong for its weight. The DWR (Durable Water Repellant) treated StormHood Hood is uninsulated, making it ideal for minimizing wind chill or providing protection in light rain. The trim fit needed, in the core, to reduce weight and bulk without sacrificing appropriate thermal performance. The result is a hoody that provides efficient shoulder season insulation, stuffs to the size of a grapefruit, and weighs a mere 260 grams.


Developed by Arcteryx, Coreloft is a synthetic insulation is a synthetic insulation made of staple  fibres in mixed sizes that are crimped to trap air and retain warmth. Available in different thickness for end-use performance and comfort.

Lightweight and highly compressible

Durable and resilient

Retains its warmth in humid and wet conditions and dries quickly if wet.


Insulated mid layers made with hydrophobic synthetic material that resists absorbing moisture. Outer fabric has water-repellent finish.

SL | Super Light

Uses the lightest weight materials available to provide high weather protection, performance and/or packability, but with the right amount of durability.

  • Weather resistant, breathable, Insulated
  • Compressible and packable, Ultralight
  • Arc'teryx Nu water repellent treatment
  • Fleece stretch side panels allow for ventilation
  • Mesh lined sleeves provide next to skin comfort
  • Gusseted underarms
  • Trim, slim fit, increases breathability during high output.
  • Adjustable, low profile uninsulated StormHood
  • No Slip Zip  front zipper
  • Full front zip with chin guard and wind flap
  • Shaped cuff with stretch fleece
  • Drop back hem
  • Adjustable hem drawcord
  • pocket configuration
  • Two hand pockets with zippers
  • Age Group: Adult
  • Closure: YKK Full Zip
  • Hood: Yes
  • Inner Fabric: Tyono 20 denier shell with DWR treatment
  • Insulation: Coreloft Compact 40 insulation (40 g/m²)
  • Windproof: Yes
  • Colour: Blue
  • Gender: Male
  • Manufacturer: Arc'Teryx
  • Weight: 261g (L)



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