First of all, EXCELLENT customer service! Our order was mis-delivered and Swiftwick resolved it right away! As far as the socks go, they are AWESOME. I first bought them for my sons to wear during mountain biking. They loved them so much I bought some for my husband and he loves them. Now I find myself stealing them from my son! They are so well made, it's hard to explain - they are thin yet really sturdy. They breathe well and don't get holes like all of our other socks. They hold up to teenage boy daily use! Great socks. And the shorties are particularly good, coming just above the ankle and they stay up!