I bought these socks after trying this seller's alpaca socks (they are fantastic too). I plan on using these socks for snowboarding but I used them for a short day hike last weekend and was very impressed with how breathable they are in 30 degree weather. As an added bonus, these socks are so soft I've worn them as slippers at home. my cold tiled floor and they insulated my feet well. I'll probably be buying a few more pairs for gifts this holiday season. 5/5!