RX 80 W is a low-volume ski boot with a last of 100mm from Lange. The shell of the boot is made in what Lange calls Dual Core which means that two different rigidity grades of plastic have been combined in the shell which allows quick and easy step-in without making the boot softer in its performance. With an inner shoe equipped with Dual 3D liner Sport, you get heat mouldability on selected parts and a soft density that makes the liner sit comfortably around the foot. With Lange's specific ShinControl for women, you get a better support in the tongue that is made of varying thickness on the sides to better fit the shape of the shin. The boot is equipped with Thinsulate insulation to better retain heat in really cold conditions.