The Flex index of this shoe line can be changed with: 1) the liner, 2) the two-piece tongue (more or less stiff) and 3) the hardness of the cuff. For women’s boots we have a flex index between 80 and 110 and between 90 and 130 for men’s ski boots.
We have worked on an ergonomic shell volume in order to allow more space in the toe of the boot. Additional volume means more comfort too, without affecting the foot holding, and this in walk mode as well.
A four-piece construction (base, cuff, and a two-piece tongue) in order to make putting on the boot easier. The flexible walking system follows the natural movement of the foot.