The new Speedmachine was built to give you (and your boot fitter) options, such as a fully customizable cork liner and PU (the same material used in many World Cup boots) shell. A mix of pre-molded 3D laminate and moldable natural cork extends the life of liners, and, since cork is known for being an efficient transmitter of energy, helps the Speedmachine feel responsive on groomers. Relieve specific hot spots in the shell with an infrared heat-molding system, allowing small areas of the shell to become malleable for fitting without heating the whole boot. An adjustable spoiler at the top of the cuff offers some options for larger calf muscles, and can help make sure you aren't too far forward, keeping balance on point. -Crystal Sagan