#The 4-Quattro SL is the lightest GripWalk hybrid ski boot in its class, offering a great mix of performance and comfort. With a flex index of 100, a 100mm mid-width last, and a low stand height, its built to deliver smooth handling without compromising on power. Made from Pebax R-new, a renewable, plant-based material, the shell and cuff feature an over-injected carbon insert for added precision, energy transfer, and rigidity.Schedule a boot fittingSki boot returns will incur a 20% restocking fee. More info on return policieshere.