The 1000 Mile Original Sock is a double layer sock that eliminates friction and keeps the foot cool and comfortable which makes it great for running racket sports and gym work as well as everyday wear The 1000 Mile Original Sock has an inner layer that stays with the foot and an outer layer that moves with the shoe to eliminate friction the unique mixture of fibres keep the feet cool and dry and it has a small toe seam and fitted heel for added comfort making these socks very versatile