Built from the chassis of the redesigned RS, the all-new RX 120 offers a racing pedigree with enhanced all-mountain features and a new, more inclusive fit. The new Dual Core shell construction and Dual 3D liner integrate perfectly, ensuring unparalleled foot-wrapping, precision, and power transmission. New RX specific fits retain Lange's strong foot hold with a more instant and accessible out-of-box fit. Lange's new "power injection" method allows the simultaneous injection of two different durometers of plastic at the exact same time. This unique mono-injection process allows targeted power transmission and shell wrapping; and creates a DUAL CORE sandwich construction throughout the shell, resulting in livelier rebound, response, and total control through the turn. DUAL 3D LINERS are pre-shaped to match the inner shell for the most precise and accurate power transmission, and around the foot for our most comfortable anatomic fit. The DUAL 3D PRO version is 100% thermo-formable with two high-density foams integrated in key fit zones for increased comfort and support. Replaceable BIMATERIAL TOE and HEELS offer increased traction and comfort when walking and can be updated when worn for longer boot life. FLEX ADJUSTMENT via removable rear cuff screws allows easy customization for enhanced comfort and performance.