Atom SL Hoody Women's



Spending time in the outdoors in the late spring, summer or early fall can involve fluctuations in temperature and comfort. Early morning chill, a suddenly shady trail, and changes in elevation and levels of exposure mean insulation is essential. But insulation geared for winter conditions can lead to overheating and discomfort. The Atom SL Hoody is specifically created to perform when 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, and each of its fabrics is intentionally selected to manage moisture and provide comfort. Soft, easily compacted, and resilient, the Tyono™ 20 shell material uses fine denier yarns that allow a fabric configuration that is surprisingly strong for its light weight. Balancing air permeability with wind resistance, the material allows airflow during active periods, but helps cut wind chill during static moments. 40g/m² Coreloft™ Compact insulation is highly compressible, insulates if wet, permits airflow, and delivers its superior performance for very little weight. Sleeves are lined with a comfortable mesh fabric, 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 has only necessary features and uses ultralight fabrics. The DWR (durable water repellent) treated StormHood™ hood is uninsulated, making it ideal for minimizing wind chill or providing protection in light rain. The trim fit minimizes bulk and layers easily, and the insulation is placed only where it’s most 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 235 grams.


Full Feature List

Technical Features
  • Moisture-resistant outer face fabric
  • Breathable
  • Insulated
  • Compressible and packable
  • Ultralight
  • Wind resistant
  • DWR finish (Durable Water Repellent) helps repel water from fabric surface
  • Breathable, stretch side panels for enhanced comfort and mobility
  • Composite construction
  • Articulated elbows
  • Gusseted underarms
  • Trim fit for base layer or light mid-layer use
Hood Configuration
  • Helmet compatible StormHood™
  • Low profile hood
  • Uninsulated
Zippers & Fly Configuration
  • Wind flap
  • No Slip Zip™ front zipper
Cuff & Sleeves Configuration
  • Shaped cuff with stretch fleece
Hem Configuration
  • Drop back hem
  • Laminated hem
  • Adjustable hem drawcord
Pocket Configuration
  • Two hand pockets


  • Mesh 100% polyester
  • Tyono™ 20 denier shell with DWR treatment - 100% nylon
  • Coreloft™ Compact 40 insulation (40 g/m²). Highly crimped, multi-denier siliconized polyester yarn that has undergone a special process which reduces the thickness of the material by 50%, without reducing its insulation value by the same amount. Lightweight, breathable, thermally efficient 100% polyester fiber.
  • Torrent™—84% polyester 16% elastane. Moisture wicking, breathable, stretchy, jersey knit textile with a soft, brushed surface and a Polygiene® finish to manage odor.


  • Machine wash in cold water.
  • Do not use fabric softener.
  • Tumble dry on low heat.
  • Do not iron.



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