For your extreme skiing that requires targeted cushion on the shin, ball, and heel for protection without bulk in tight-fitting boots, Smartwool's PhD® Ski Light Elite Pattern socks are here to help get the job done. These ski socks feature their Indestructawool™ technology for enhanced durability, 4 Degree™ elite fit system for a dialed-in, performance-oriented fit, and their Virtually Seamless™ toe for in-boot comfort. With these in between your foot and boot, you'll experience warmth and comfort that will help you tackle even the most daunting mountains.