HEEL RETENTION SYSTEM
   
540° HEEL RETENTION SYSTEM 360° HEEL HOLD SYSTEM FLEX WINDOW
It combines a arch shaped lace loop which improves lace load distribution to the webbing plus a fabric tape directly connected to the front tongue of the boot. Consequently is possible to transmit a stronger power of closure in the upper part of the foot and along the ankle surface and when you pull the lace, the tongue is brought automatically down in order to provide a bomb proof heel retention performance. A complete wrap of the ankle… anchored to the heel of the boot laces run through a brass or nylon loop to wrap around the heel to lock the ankle in place. The ability of creating a boot which is able to flex in progressive way required years of studies, experience on the snow and many laboratory tests.The Flex window enhances the comfort and mobility of the foot and it perfectly represents the balance between the power of transmission and a progressive flex. The side parts of the collar area slide on the upper transferring the power in a constant way, avoiding any possible overlapping between materials which could lead to a waste of energy.