Product descriptionATK say - Advanced Performance Brake System, double magnetic heel flaps, release value adjustment, and a new exclusive colorway, all in less than 300 grams. Fewer concerns and more fun on every snowy ridge. MaterialsAlu 7075, POM, Stainless steel Release range3-8 Walking modesFlat | +28mm | +45.5mm Boot size adjustment20mm Heel elastic travel12mm Toe piece release adjustabilityNo Ski brake systemAP ATK Crest 8 AP Ski Binding Black Light Bronze