All the high performance benefits of the Hardwire telemark binding with the solid release system of the CRB. The 20mm V-tech riser improves the Function and performance of the Voile Release Binding. It provides a consistent release, retention, and is the only telemark release binding that will release in a backward fall, which is how most knee injuries are sustained. Having a release system increases the chance of separation of you and your skis, thus helping to prevent injury and deep burial if caught in an avalanche. Available in 2 binding sizes for your boot and 2 ski brake widths for your ski, please specify.