Here's what other sites are saying:
These Grivel long flex bars are designed to replace the standard rigid bar included with Grivel G10, G12, Air Tech, or Air Tech Light crampons to provide enhanced flexibility on alpine terrain.
Built with multi-ply stainless steel, Flex Long Bars from Grivel allow you to walk more comfortably when you're traveling with crampons on. The springy flex of the bar works like a car's leaf suspension to flex with the motion of your boots.
- Mountain Gear
The crampons with either Classic or New Classic bindings now have a new flexible regulation bar for improved fit and performance on walking boots: flexible and elastic, allows the foot free movement without over-forcing or stressing the bar, even on extended use. The flex regulation bars are made of multi-ply stainless steel and work just like a car's suspension springs. Note: the Flex Regulation Bars can be used on all of Grivel's crampons.
Thanks to the Grivel Long Flex Bar, now you can walk more comfortably when traveling with Grivel crampons. Working like car suspension, the long bar adds spring and flex as take each step.