Fox River Motion Quarter
Here's what other sites are saying:
When you run in the Fox River Motion Quarter Crew Sock, little wings pop out and give you the extra push you need to make it to the finish. The mesh on the top of the Quarter's arch adds flexibility and ventilation, and the spandex arch brace helps support and hold the sock in place for a snug fit (those wings tend to get a bit overzealous sometimes). Fox River thinks you'll dig the soft high-performance blend of Ingeo (fabric derived from corn) and recycled polyester fabric blend, and if you're lucky, the Motion's wings may actually lift you up and fly you to your goal.