I think you're talking about the Puma 1000 boots. They have a system designed around what they call the "medically defined angles of injury" to keep your foot from bending too far forward or backwards. We have a set of them in white in our store here in Sacramento, CA. They seem pretty good, and I do like how they aren't too thick above the toe area either, so you can still slide your foot above or below the shifter fairly easily. I'm not sure how well they perform. That being said, I decided to order some Vertigo Corsa boots myself just a couple weeks back. I can't say that they are better or worse than the Puma 1000 boots, but I guess I just have more faith in a boot that's been tried and tested for some time now than a boot that's kinda brand new to the market. That's pretty much the ONLY reason I chose the Sidi boots over the Puma boots.