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The Proton SL Hoody is Arc'teryx's lightest synthetic-insulated hoody, built for climbing and other high-output cold-weather activity. It pairs a breathable, stretchy nylon-polyester shell with light synthetic insulation and a polyester lining, so it vents heat while you move and still takes the edge off when you stop. At about 13 ounces it packs small and layers easily under a shell. Rivals like the Patagonia Nano-Air and Black Diamond First Light are warmer but heavier; the Proton SL trades some warmth for breathability and low weight, which is what owners praise it for.
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Lowest price we've seen: $168.00 on Nov 13 at evo.com. Tracked across 5 stores since Nov 13.
Owners rate it highly as a breathable active layer for climbing and cold-weather movement. Most praise the low weight and stretch, while some find it too thin for cold static use and note the delicate face fabric.
The Arc'teryx Proton SL Hoody is a lightweight insulated hooded jacket for men, made for rock and ice climbing. It has long sleeves and a zipper closure, and comes in a solid color.
The shell is made of nylon, polyester and spandex, with a polyester lining. The fabric is stretchy, durable, breathable and water repellent. The jacket has pockets.
