With a soft flex and generous fit, the Alpina T30 cross country ski boot will allow you to wiggle your toes even wearing thick socks. The skate inspired hinged cuff with a power strap will not restrict forward motion but provides excellent ankle support. The zippered lace cover keeps snow out, and Thinsulate insulation keeps warmth in. Soft synthetic Leather upper for durability and longevity Hinged plastic cuff with Velcro strap add support and control Zippered cover protects laces from ice and snow and adds warmth Thinsulate insulation for added warmth while the PU coated uppers resist moisture Anatomical foot-bed supports your foot for all day touring comfort The new Alpina TC sole is compatible with all adult NNN, Turnamic, and Prolink bindings Alpina Size Chart