Men's Proton Sl Hoody

The PROTON SL HOODY is the lightest and most breathable insulator from Arc'teryx, ideal for high-output activities in cool conditions. It features Octa® Loft insulation that retains its shape and breathability, keeping you warm without overheating. Updated with recycled Fortius™ Air 20 fabric, it offers lightweight durability, stretch, and improved weather resistance.