Andrew Livingston wrote a review of Arc'teryx Alpha SL Jacket - Men's on December 27, 2011
When I first got this and wore it in the rain, I was concerned. When I removed the jacket, I could see moister inside on the shoulders and in the sleeves, which had me really disappointed. What I realized was that this was my sweat as it evaporated through the shell, the jacket was not leaking, and you can solve this problem by wearing a Patagonia Capilene or equivalent which transfers your sweat better. SInce then, I've used it climbing Mt. Hood, Diamond Peak, Smith Rock, running, biking, winter camping, snowboarding, and through multiple blizzards in sub-zero. As a Paclite, I'm not sure if it was meant for the extreme, but it stands up to the challenge.