The original 1993 purple and pink model!
After seeing my first pair of these bindings in use during a ski trip on the Haute Route of France I returned to the US sans my telemark bindings with my prized new Dynafit set-up. Simply put this binding offers the lightest option for ski touring and offers the downhill performance that most are looking for in the backcountry.
The Dynafit binding works by rather ingenious engineering. Unlike most AT (alpine touring) bindings that have a bar connecting the toe and heel plates, the Dynafit binding uses the entire boot to attach the two together through the rigid nature of plastic ski boots. This means that a specific Dynafit compatible boot is necessary for the system to be complete, where the toe and heel piece of the binding actually “prongs” itself into the boot. This eliminates much of the extra metal that would construct a binding made in the more classic downhill style.
The Fritshi Diamir type binding with a more classic alpine type construction
The Dynafit compatible boot. Notice the metal toe and heel inserts.
-- Ben Traxler, AAI Guide