As the lightest and most breathable in the Arc’teryx Insulation collection, the Proton SL Hoody has been created to ensure you remain at the optimum temperature during demanding climbs and other high-output outdoor activities. With its rugged Fortius™ Air 20 nylon face fabric, the Proton SL is impressively moisture-resistant, lightweight and durable with Octa® knit insulation designed to hold its loft and shape whilst balancing warmth when you need it with breathability to keep you cool and dry when you start to work up a sweat.

Cut to be fitted against the body with articulated patterning that’ll maintain reach, flexibility and comfort, this lightly insulated jacket features a helmet-compatible hood that is both adjustable and insulated, two zippered hand warmer pockets and has been updated to include a handy zippered chest pocket, too. Finished with a durable water repellent coating to repel light moisture during unexpected weather changes, the Proton SL Hoody is a go-to insulated companion when you need something super lightweight, low-profile and temperature regulating.

Features: 

• Moisture-resistant outer face fabric
• Breathable, lightweight and durable
• Fitted fit with articulated patterning for mobility and comfort
• Helmet-compatible, adjustable and insulated hood
• Two zippered hand warmer pockets
• Single stretch woven zippered chest pocket
• Fortius™ Air 20 face fabric effectively balances air permeability and weather resistance with lightweight durability and stretch
• Octa® Loft breathable insulation provides thermal protection
• DWR (durable water repellent) finish repels light moisture

Materials:

• Body: Fortius™ Air 20 88% nylon / 12% elastane plain weave
• Lining: Octa® Rachel knit insulation 100% polyester
• DWR (durable water repellent) finish repels light moisture

Specifications:

• Weight: 311g / 11oz
• Garment centre back length (size S): 68cm / 27" (varies by size)
• Intended use: alpine / rocking climbing