The RC4 Curv 110 Powered by Vac is an athletic-dynamic boot with a convincing and ingenious fit. Individuality like never before thanks to the completely new 3D Canting makes this boot aggressive and uniquely tuned. A hard flex index of 110 means this boot offers absolute precision and excellent control performance. Thermoformable aramid makes this ski boot special. This temperature-stable material ensures that flex stays the same in virtually all conditions, ensuring constant and efficient power transfer. The unique setup of a completely adaptable shell made of Vacu-Plast material and AFZ liner makes perfect power transfer possible. This takes place through the function zones which actively support the foot, guaranteeing an ideal fit and efficient power transfer.