I've been wearing Smartwool socks for ten years and have always lived with the high cost due to their quality to keep feet warm in winter and too adjustable and comfortable in spring and summer. But then I found them a few weeks ago and was amazed. The materials you'll find in Smartwool are the same as these Fun Toes, except they contain more Merino wool (67% vs. 80%). They feel and warm my feet without making them sweat like good wool, but they're half the price. If you are a Smartwool user like me you must buy them. Forget those other options at Revain and elsewhere, this is the real deal.