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.


  • Moisture-resistant outer face fabric
  • Breathable and insulated
  • Compressible and packable
  • Wind resistant, ultralight and composite construction
  • Breathable and stretch side panels for enhanced comfort and mobility
  • Trim fit for base layer or light mid-layer use
  • Articulated elbows and gusseted underarms for mobility and comfort
  • Uninsulated, low profile hood
  • No slip zip™ front zipper and wind flap
  • Shaped cuff with stretch fleece
  • Drop back hem, adjustable hem drawcord and laminated hem
  • Two hand pockets and dwr (durable water repellent) finish repels moisture


  • Mesh 100% ™ 20 Denier Shell With Dwr Treatment - 100% Nyloncoreloft™ Compact 40 Insulation (40 g/m²)
  • Weight: 235 g
  • Centre Back Length: 66.5 cm / 26.2 Inch