The RX 100 combines the ONLY 100mm lasted mono-injection shell, a more moderate flex and Lange's Control Fit Technology. New Control Fit Technology gives this boot the best "out of the box fit" imaginable. The mono-injection shell allows for easy customization when necessary while Lange's Control Fit Liner addresses traditional hard- to-fit issues. The true lasted liner, one piece toe box, instep pocket and saddle stitched seams alleviate common pressure points and increase circulation. The RX 100 delivers the level of precision and fit inherent to the RX line giving lighter but aggressive freeskiers the boot they demand and deserve.