Arc'teryx - Proton LT

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A High breathability mid layer designed for skiing and climbing. High durability makes it ideal for climbing in. The jacket has a helmet compatible hood and one roomy chest pockets you can access when wearing a harness. It weighs just 400g in the men?€?s medium size, which isn?€?t a lot for the warmth it promises. We think this would be a great summer belay jacket, and it looks really good for active wear in winter too.