Maximum comfort and support for all activities. The perfect sock for those with an active lifestyle. Use as a blister-preventing base layer under a traditional thick walking sock for 4 season use or as a stand-alone summer sock with lightweight fabric boots. The 1000 Mile Ultimate Liner Sock is a double layer sock: the unique Tactel® inner layer wicks away perspiration to the moisture absorbing outer layer, keeping the feet dry. The combination of fibres and top venting maintains a comfortable temperature for the foot. Arch bracing offers additional support. HeelPower fabric technology grips the heel firmly in place,so no slippage!• Unique dual layer construction to eliminate friction and chafing for a more pleasant and comfortable run• Heel Power technology prevents the socks from slipping off the feet• Comfortable and breathable• Lightweight outer layer vented to increase breathability• Arch bracing for additional support• Double layer construction to eliminate friction and reduce wear