The Tecnica Mach 1 110 MV is an excellent ski boot for the strong intermediate to advanced skier who has a medium width forefoot and medium size calf volume. This season Tecnica has added T-Drive to the rear spine of the shell. T-Drive incorporates a carbon rod that connects the upper cuff to the lower shell to enhance power, quicken up your skis edge to edge and add lateral power. Celliant has been added to the liner to help reflect body heat back to its source to help keep your toes warmer on the mountain. LiftLock Buckles stay open when you want them to, to make this boot incredibly easy to slip on your feet. A 45mm Powerstrap keeps a tight wrap across your shin and increases rebound.