Arc'teryx Men's Atom LT Hoody

Style: 14644
3 Reviews
$259.00 $179.95 to $259.00
$259.00 $179.95 to $259.00


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The trim hybrid Arc'teryx Men's Atom LT 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.

Arc'teryx Coreloft Insulation is a synthetic insulation made of fibers in mixed sizes that are crimped to trap air and retain warmth. Available in different thicknesses 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 

Atom: 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

Atom LT: Most versatile in terms of insulation, weight and application, often used as an outer layer with weather resistant properties

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

  • Laminated hem

  • Adjustable hem drawcord

Pocket Configuration:

  • Internal chest pocket

  • Two hand pockets


  • Polartec Power Stretch with Hardface Technology 88% polyester, 12% elastane: 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 insulation: Made with highly crimped multi-denier siliconized polyester yarn, this lightweight, breathable, and thermally efficient, 100% polyester staple fiber 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

Arc'teryx Men's Jackets and Tops Sizing

Body Size:X-Small | 36X-Small | 36Medium | 40Large | 43X-Large | 46XX-Large | 50
Chest (in.):363840434650
Waist (in.):293133363943
Hip (in.):363840434650
Sleeve (in.):323334353637
Calculate your own body measurements, then select your product size.

How to Find Your Measurements
Sleeve: With your arms in a slightly bent position, measure from the center of the back of your neck, along the length of your arm, to the wrist.
Chest/Bust: Measure around your chest/bust, holding the measuring tape under your armpit.
Waist: Measure around your hips at the narrowest part.
Hip: Measure around your hips at the widest part.
Crotch to Ankle: From a standing position, measure from your crotch to your ankle.

Ratings & Reviews

3 reviews

  • 4 stars
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  • 3 stars
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  • 2 stars
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  • 1 star
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Great jacket; lightweight and warm


Very lightweight but still able to insulate really well. It's great to throw on as a single layer when it's cold out and avoid having to put on multiple layers only to take them off later.


Love this jacket


I bought this before a 6 day hike in the Sierras climbing Mt Whitney. Great piece to layer under my Beta AR. I wore this around camp every night when things got nippy (super hood). If it isn't raining, I find it is my go to jacket in cool weather. It is lightweight and stuffs down small for a day pack. I also find I pop it on around the house like a sweater. With the Beta AR, it keeps me warm walking the dog down to the low 30s without issue.


Atom Lt from uncle Dan’s.


Love it. I now have 3 atom lt’s. One black. One blue and one pilot color.