Swiftwick

Flex Zones:  Prevents any bunching or irritation at flexpoints.

Breathable Upper: Lightweight uppers help increase breathability to keep feet cool.
Seamless Toe Box: Eliminates any friction around your toes for a comfortable fit.
High Density Knit: Creates a construction that is soft and durable.
Archband Support: Maintains shape, keeps socks in place, and firmly supports arch.
Y-shaped Heel: Creates a snug fit that moves with your foot without any bunching or slipping.