The 4-QUATTRO SL is the lightest GripWalk hybrid ski boot in its class. A low stand height and flex index of 100 provide the ideal balance of performance and comfort for all skiing pursuits. The shell and cuff are made from Pebax R-new®, produced from renewable, plant-based sources. The shell incorporates an over-injected carbon insert for enhanced precision, energy transmission, and torsional rigidity.  The new Alpine Axial Hybrid provides a classic overlap construction allowing easier entry into the boot and enables excellent power transmission and unparalleled control. The Presa® sole has an ergonomic design that guarantees excellent grip when walking and is compatible with GripWalk certified downhill or ski touring bindings. Power, precision, and sustainability come together to make the 4-Quattro SL the perfect all-day boot, both on and off piste.