The Impact Pro Boot has 3 adjustable rapid release levers which enable the ankle area to flex in a fluid and natural way. This was one of the technical requirements demanded by the riders of the world championship trial team who collaborate closely with Stylmartin. Impact protectors are at the shin, heel and ankle, together with an internal heat shield, while the internal lining is 100% waterproof. The inside padding on the Impact Pro model helps reduce the wear on the frame and on your boot while riding. These boots are perfect to keep your feet safe and allow the movement necessary for trials. Please refer to the sizing guide below before ordering.