The Radical Binding is Dynafit's patron saint of the innovative TLT tech compatibility, and the current ST Radical Binding is the very same Radical, except the beefier heel piece amps up the Radical's rowdiness. This amplified rowdiness is ideal for backcountry skiers like us who eye every cliff on the way up the skin track in hopes of dropping some during the downhill. The beefed-up heel piece also allows 12. 5 mm of length adjustment to increase or decrease the pressure on your boot, which determines whether you come out of the cliff-jump with or without your skis. If it's without, this binding is Dynafit's only Radical with brakes to make sure they don't careen downhill without us.