After repeated bouts with tendinitis in my heals, an acupuncturist told me to always keep my heels warm. So, I started trying wool and other warm socks and have found that the heavy buffalo wool socks are the best. At first, my wife got me a couple of pairs as a gift, I would never have spent that much money on socks. But I have found that they are warm and wear much better than other "warm" socks, I need a wool content of 18-20% or higher to get the warmth I need, although lower content is better than nothing. I have tried heavy wool boot socks from Carhardt and others but they don't last like the buffalo wool. I even recently tried the wool ankle socks and love them, they will be my go-to summer socks. In a moment of decadence, I even tried a pair of the silk blend buffalo socks, for a few extra dollars they are the most luxurious socks I have ever worn, they are now at the top of my wish list for gift occasions. I have no logical explanation for spending $45 on a tie but not on a pair of luxurious socks. And, I can get 2 pairs for the cost of a trip to the acupuncturist/MD and I can skip all the pain and hobbling around leading up to those medical visits.