Ridge Comfort Dry socks are designed to be form fitting over the mid part of the foot in order to keep the sock from slipping off. The sock comes up over the calf and stays up all day long. Constructed of 80% moisture-wicking Comfortrel polyester, 18% nylon, and 2% spandex, they're made to keep your feet comfortable and cool all day. Model 180 fits shoe sizes 10‒13 and model 181 fits sizes 6‒9. Available in black.