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Atom LT Hoody


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Atom LT Hoody Men's Insulated, mid-layer hoody with wind and moisture resistant outer shell; Ideal as a layering piece for cold weather activities. Atom Series: Synthetic insulated mid layers | LT: Lightweight.

Insulated, mid-layer hoody with wind and moisture resistant outer shell; Ideal as a layering piece for cold weather activities. Atom Series: Synthetic insulated mid layers | LT: Lightweight.

Carbon Copy
Echo Blue
7 Detail Photo(s), 2 Video(s)
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XS, S, M, L, XL, XXL
360 g / 12.7 oz
Trim fit, Hip Length
Sizing Chart: 
Gender Equivalent Product:


This trim hybrid hoody is designed as an active-use insulation layer, providing vital core warmth with liberal mobility and breathability. Lightweight and compressible, the Atom LT Hoody features Coreloft™ insulation in the torso, arms and hood. The side panels and underarms feature Polartec® Power Stretch® with Hardface® Technology, delivering stretch mobility and breathability. A wind and moisture resistant outer shell extends stand-alone usability.


Fact: Every person at Head Office owns at least one Atom LT; most of the women have two.
The reason: Coreloft™ insulation inside a light taffeta shell. All the comfort of a sleeping bag, but it feels weightless.


The benefit of taffeta fabrics is their light, airy nature with an ability to turn aside wind. The Atom series have a taffeta outer lining that is treated with DWR (durable water resistant) finish to give them a long-lasting ability to shed moisture. In light precipitation, the Atom LT can be worn as an outer layer.


Mid layers that can function as outer layers have varied degrees of weather shedding capability; they also have varied degrees of moisture management. In addition to being made of breathable Coreloft™ insulation, the Atom LT has breathable side panels of Polartec® Power Stretch® with Hardface™ technology to help regulate temperature during exertion.


Highly compressible, Atom pieces pack down into a tiny parcel of stored warmth. Store the jacket inside its own pocket, or tuck it into a sleeve or inside the hood if you are not restricted by space. A quick shake restores the original loft, time and again.

Learn More About This Product

Arc'teryx Coreloft™ Insulation

Coreloft Fibres Coreloft™ insulation

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

Key Advantages

  • Lightweight and highly compressible
  • Durable and resilient
  • Retains its warmth in humid and wet conditions and dries quickly if wet

Arc'teryx Fit Guide - Trim Fit

These trim fitting garments share motion-friendly traits with our Athletic fit, but are patterned with lower volume for reduced bulk. Our trim fit is sized for a base layer and a trim synthetic or down filled mid-layer

To find out how to calculate your body measurements, view our Sizing Charts:

Men's Tops | Men's Bottoms
Women's Tops | Women's Bottoms


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

LT | Light Weight

Built with highly durable top performance materials but designed with a streamlined minimalist set of features to provide very light weight.

Full Feature List

Technical Features
  • Moisture-resistant outer face fabric
  • Breathable
  • Insulated
  • Lightweight
  • Compressible and packable
  • Wind resistant
  • DWR finish (Durable Water Repellent) helps repel water from fabric surface
  • Composite construction
  • Breathable, stretch side panels for enhanced comfort and mobility
  • Articulated elbows
  • Gusseted underarms
Hood Configuration
  • Insulated, helmet compatible StormHood™
  • ScubaHood™
Zippers & Fly Configuration
  • Full front zip with wind flap
Cuff & Sleeves Configuration
  • Stretch-knit cuffs
Hem Configuration
  • Drop back hem
  • Adjustable hem drawcord
  • Laminated hem
Pocket Configuration
  • Internal chest pocket
  • Two hand pockets


  • Polartec® Power Stretch® with Hardface® Technology—88% polyester, 12% elastane, 230 g/m². A four-way stretch fabric that allows for excellent athletic movement and good breathability to maintain comfort. Some products feature Hardface® Technology for a higher level of abrasion resistance.
  • Coreloft™ 60 (60 g/m²) insulation. Made with highly crimped multi-denier siliconized polyester yarn, this lightweight, breathable, and thermally efficient, 100% polyester staple fibre is very compressible and has excellent loft retention.
  • Tyono™ 20 denier shell with DWR treatment - 100% nylon


  • Machine wash in cold water on a gentle cycle
  • Do not bleach
  • Tumble dry on low heat on a delicate setting
  • Do not iron
  • Do not wring
  • Do not dry clean


  • Alpin Tipp(DE)
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