Arc'teryx Proton SL Hoody Men’s – Lightweight Breathable Softshell Jacket with Insulated Hood – Black

Push your limits in comfort with the Arc'teryx Proton SL Hoody – a versatile, lightweight softshell jacket built for high-output alpine pursuits. Redesigned from the popular Proton FL and Lightweight Hoody models, this updated version features a low-profile insulated hood, more durable face fabric, and refined design lines. Engineered for activities like climbing, hiking, and trail running, the Proton SL delivers exceptional breathability, light insulation, and stretch mobility.

Constructed with Octa Loft knit insulation and a tough, stretchy Fortius Air 20 shell, this active insulation layer balances airflow and warmth across varying intensities and temperatures. Whether you're scaling a summer peak or powering through a crisp morning run, this hoody keeps you agile, dry, and just the right amount of warm. Lightweight, packable, and insanely comfortable—this is the layer you’ll keep reaching for day after day.

Features:

• Updated & Upgraded Design – Modernized version of the Proton FL and Lightweight Hoody with improved durability and fit.

• Breathable Active Insulation – Octa Loft synthetic insulation retains warmth while allowing heat and moisture to escape.

• Durable Face Fabric – Recycled Fortius Air 20 nylon/elastane blend resists abrasion and stretches for unrestricted movement.

• Insulated Helmet-Compatible Hood – Low-profile, adjustable hood fits under climbing helmets for added warmth without bulk.

• Weather-Resistant Finish – FC0 DWR (Durable Water Repellent) coating sheds light rain and moisture.

• Thoughtful Storage – Two zippered hand pockets + one zippered stretch chest pocket for secure essentials.

• Enhanced Mobility – Articulated elbows, gusseted underarms, and trim fit offer natural movement during active use.

• Comfort-First Details – Stretch-knit cuffs and adjustable drop hem seal in warmth and move with you.

• Ultralight & Packable – Weighs just 13.1 oz (370 g), making it an easy addition to any adventure kit.