I have last years IPOs. All plastic. Flex is average I'd say.
The construction of these is fairly bulky and they're heavy. I don't use them for much more than all mountain.
Edit: their design improves torsional flex but not much on lateral. The high back doesn't do much and doesn't give you that extra leverage laterally. My two cents.
Last edited by ksup3erb; 01-21-2014 at 04:02 PM.