Featuring a double lsquosock in sockrsquo construction the design of x socks run evolution socks permits these serious runners socks to absorb friction at the outer layer while letting moist warm air exit through both from the mesh hose next to the skin this doubling up ensures that the foot remains dry and defended from abrasion with all rubbing of surfaces done between the two layers rather than on the foot so no blisters form as the close fitting finely knit mesh inner sock transpo