A hard-charging, all-mountain boot, the RX 130 comes in a 100 mm last or a low volume 97 mm last, both with a flex index of 130, which is consistent thanks to Lange’s mono-injection technique. Tech details include Lange’s Natural Stance, which provides an upright stance to work in concert with modern skis that require more lateral movements. The Control Fit Liner sports fit details like anatomical padding and a one-piece toe box. The Ultra-grip soles are replaceable.