I have owned a couple pairs of these. Very comfortable, warmer than the regular TBB socks without being sweaty. Only concern is the durability. I wash them in a laundry bag and air dry as I do my other merino cycling, running or hiking socks, but these tend to show fraying and wear much more quickly than other brands. Unlike something like the Ultimate Bibs which are an exceptional value for high quality at a much lower price than the big brands, these socks are more of a "you get what you pay for" situation.