I'm a an avid mountain biker and mountain bike coach. I ride 3-4 days per week, almost year around. I value the quality of the gear, clothing, components, and equipment I use. I have two pairs of Swiftwick socks and they are my favorites. The have a compression factor which is very important and they also wick moisture quickly and keep my feet both warm and dry. They have a cooling effect when the temps are hot and a warming effect when temps are cold. The perfect Goldilocks condition. They are very well made from quality materials and they last a long time and keep their shape. Looks are important also, so the style, color, height choices are very nice. That, along with type of cushion and compression allow all day comfort and durability that is unsurpassed. I've worn over a hundred different road and mountain bike socks, and these truly are the best socks you'll ever own!