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Arc'teryx M's Proton FL Hoody

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Light, breathable insulated hoody for high-output activities in cold conditions. | FL: Fast and Light.
Ordered before , delivered tomorrow! You got: 03:39 hours
Arc'teryx M's Proton FL Hoody

Climbing durable, trail light, midlayer or standalone, the versatile Proton FL’s breathable thermal protection delivers comfort across a range of temperature and output levels. Octa® Loft knit insulation provides warmth, resists packing out, and allows airflow to regulate comfort. Abrasion-resistant Fortius™ Air 20 fabric stretches, resists wind, and allows temperature-regulating airflow. A zippered chest pocket secures a radio, articulation aids mobility, and the low-profile insulated hood fits comfortably under your helmet.

Updated with improved Octa® Loft knit insulation and resized stretch chest pocket.

Technical Features

  • Air permeable
  • Breathable
  • Light wind resistance


  • Octa® Loft, clean finished, breathable insulation provides thermal protection while maintaining a comfortable micro climate
  • Fortius™ Air 20 face fabric effectively balances air permeability and weather resistance with lightweight durability

Design & Fit

  • Trim fit for athletic performance

Fabric Treatment

  • DWR (Durable Water Repellent) finish repels moisture

Hem Configuration

  • Adjustable hem drawcord

Hood Configuration

  • Helmet compatible
  • Adjustable insulated hood


  • Articulated elbows
  • Gusseted underarms for mobility and comfort

Pocket Configuration

  • Two stretch woven zippered chest pockets
  • Two zippered hand warmer pockets

Zippers & Fly Configuration

  • No Slip Zip™ front zipper

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