Everyone's foot is different that's why Fischer made their fully customizable RC4 The Curv 110 Vacuum Full Fit Ski Boots. Designed and constructed for the utmost comfort and performance in a lightweight boot. They feature Fischer's Connected Fit, both the shell and liner are fully heat-moldable for a truly custom fit. Additionally, their all-new Composite Flex Control that uses Aramid plastic that is temperature stable, ensuring the flex stays the same, no matter the conditions. Precision in both comfort and performance, the RC4 The Curv 110 VFF ski boots are the ultimate boot for intermediate to advanced skiers.