The comfortable, warm, easy to use Z2 gives kids support, comfort and a natural position. The ski boot is designed with Hi-Top technology that transfers the power from the ski boot to the ski. This makes it easier and faster to lean into the turns. With Duo Phase Flex, children retain their natural position and get a balanced, centred position, enabling adventures with more control. Vario Last Design concentrates on the child's feet and makes the boot wider percentage wise for smaller sizes.