Fit and Design: Performance fit winter socks 14” over-the-calf height provides full coverage to help keep snow out Made with merino wool to provide thermoregulation, sweat management, and odor resistance Body-mapped mesh zones promote additional breathability Wider welt enhances all-day comfort and achieves a more secure fit Thickest Smartwool® ski socks Technology: Indestructawool™ technology features a construction method that achieves exceptional durability and comfort 4 Degree™ Elite Fit system offers a dialed, performance-oriented fit with a flex zone at the ankle joint to keep your socks in place Virtually Seamless™ toe incorporates smoothed out toe seams for ultimate in-shoe fit and comfort Additional Details: Machine wash warm, inside out Do not bleach Tumble dry low Do not iron Do not dry clean Smartwool Unisex PhD Ski Medium Socks