The New Elan U-Flex boot flexes to allow natural movement of the toes, and flexes with the ski’s flex because of the front sole movement. Exceptional boot flex and enhanced toe movement, combined with the high quality of the materials used for liners, helps this boot provide warmth and comfort. With the Volume control plate a single boot size covers 3 foot sizes, as the boot is equipped with a special plate that modifies the inside volume and sizes depending on how the plate is placed inside the boot.