When you're pushing hard on alpine routes or tackling technical climbs in cool conditions, the Arc'teryx Proton SL Hoody delivers the perfect balance of warmth and breathability that active climbers demand. This ultralight insulated jacket features innovative Octa® Loft insulation that maintains its loft whether you're wearing it or stuffing it deep in your pack, while the breathable knit construction prevents the overheating that plagues traditional puffy jackets during high-output activities. The Fortius™ Air 20 face fabric provides weather resistance and 2-way stretch for unrestricted movement on technical terrain, while the helmet-compatible hood ensures this mountaineering essential works seamlessly with your climbing setup. At just 370g, this breathable insulation layer takes the guesswork out of staying comfortable during cold climbs, letting you focus on the route ahead rather than constantly layering up and down.
Features
Octa Loft breathable knit insulation maintains loft and allows airflow during high-output activities
Two-way stretch fabric with articulated patterning for unrestricted climbing movement
Helmet-compatible adjustable hood designed for alpine climbing safety requirements
Highly compressible design stuffs easily into pack bottom for space-saving storage
Weather-resistant outer fabric sheds light precipitation and wind
Moisture management system prevents overheating during active pursuits
Three-pocket configuration including chest pocket for essential gear access
Fair Trade Certified manufacturing ensures ethical production standards
Specification
Value
Weight
370g (13.1 oz)
Fit
Fitted
Length
29 inches (size S)
Materials
Face Fabric: Fortius™ Air 20 (88% Nylon, 12% Elastane, 58 gsm) | Insulation: Octa® Loft (100% Polyester, 98 g/m²)
