The Wrightsock Running II is one of the newest additions to the ever growing Wrightsock family. This Anti-Blister Double Layer style is a variation of their original running sock. The Wrightsock Running II comes with their patented "Stabilizer Zone" arch band and has a little bit more Lycra for a contoured and snug fit. This mid weight flat knit running Wrightsock is an absolute must have for a runner seeking an absolute flawless fit on the track and in their favorite running shoes. The outer layer is composed of Enhanced Dri-Wright II polyester for rapid moisture wicking action and the inner layer is that same smooth hydrophobic Dri-Wright II for even greater moisture management. For optimum performance, wash before wearing. Turn inside out, machine wash warm. Do not bleach or use liquid fabric softener. Tumble dry.Quarter length is approx. 3 1 2" from the heel seam to the top of the sock Use Wrightsock's signature size chart with color coded toe seams to select the "Wrightsock" size for you!