Sidas Lange S-RX W ladies ski boot. Developed in partnership with Lange. Comfort combined with precision, exclusive to Sidas mostly in Europe, this ski boot is suited for ladies with narrow feet, the last width is 97mm . The PU Shell is precise in fit, with a flex index of 110, this boot is aimed at high intermediate and advanced skiers. A Sidas Booster Power strap is included for each boot. This boot is combined with the Sidas PU Classic Flex W liner. This is a custom solution to provide the perfect fit and optimum comfort with a foamed liner, designed specifically for women. The microfur internal lining provides softness and warmth, and ensures easy foot entry into the boot. A new cuff structure provides a better torsion/comfort ratio.