With both liner and shell personalization options, QST Pro 90W fits, skis, and walks better than any boot in its class thanks to the revolutionary Endofit tongue design WEIGHT: 3040g Flex Index: 90 Strap: 35MM Last: 100/106 3 light micro alu buckles The buckle is shaped with a minimum of material to ensure a reduce weight as much as possible. To micro adjust the length of the buckles for a precise and personalized closure, just turn the lever. Alu buckle : more resistant, rich finish, used with confidence by all Salomon athletes 24mm riveted oversized pivot Surelock mechanism PU/PA shell Twinframe2 Women liner Cantable pads compatible Waterproof gusset Motion Fit Endofit tongue Specific Women cuff design Thermosoft footprint PP cuff Touring pads low tech compatible Anatomical My CustomFit 3D Performance liner