Ultra lightweight performance socklet... Supersoft Tactel Micro™ outer layer, soft Tactel™ inner layer... Hi-tech 2-layer fabric wicks perspiration away from the inner layer to the outer layer... Superfine mesh on top of foot to help keep foot cool... Antimicrobial... Hand-linked flat toe seam to help prevent blisters... Arch grip section and 'Y' heel for optimum fit. Lycra® for stretch and recovery...