This sock was designed for ultimate functionality. We worked with boot fitters to create a sock to aid in fitting ski boots. The Boot Fitter sock is made with high-content merino for temperature regulation, nylon for durability, and nano glide for ease of entry into the boot. Hit the slopes with this functional and technical-looking sock. Anatomically Designed & Knit | Fox River Men's Bootfitter Elite Ultra Lightweight OTC Ski Socks