Ultra lightweight performance sock... 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... Open mesh leg for airflow and cooling... Antimicrobial... Hand-linked flat toe seam to help prevent blisters... Arch grip section and 'Y' heel for optimum fit. Lycra® for stretch and recovery...