These compression tights fit well and most likely will resist most moisture. They also seem durable and should hold up for endurance events like cold-weather races--maybe even triathlons. However, I haven't had a chance to test them in extreme cold (below -5 degrees C) and, judging from how they feel in moderate cold (+5 C), I'm not sure they're up to the challenge. But for the price, they're more than good enough if you aren't expecting them as a lifeline in super-cold climates. And they look good too!