The Rossignol Men's AllSpeed Pro 110 Ski Boot is a an on-piste ski boot with a reduced weight that delivers power to groomed adventures. Its Sensor Blade shell creates an energetic feel that improves your skiing power rather than reducing it for the sake of comfort and stability. The adjustable flex and insulated, custom liner provides a supportive feel that ensures your feet stay in place. Compatible with GRIPWALKA(R) Technology, this boot is capable of the most subtle and useful Features for maximum thrill on the mountain. Features of the Rossignol Men's AllSpeed Pro 110 Ski Boot Anatomical 100mm in.mediumin. Fit Delivers award-winning power and precision in a customizable, boot-Fitter friendly design Sensor Blade shell Technology reduces weight and drives energy directly into the ski Custom OptiSensor Thinsulate(TM) Platinum liners allow pin-pointed customization for supreme comfort, warmth, and support Flex Adjustment allows a larger flex range for customized power, Performance, and comfort via a simple rear spine screw adjustment Custom Optisensor T2 Liners feature mono-material (FLEXALON) padding for enhanced precision and comfort. Customization applies only in the comfort zones, the support zones remain unchanged.