Emmett I

Zesheng, You are correct. There is no US sizing on the pants. What we have as XS is the EU 128 / 7-8yr old.

Hi Justin, Shoot us an email at help@skimo.co - we typically prefer to size hardboots based on either actual foot measurements or previous hardboot sizing.

Jill, Boots that don't use Dynafit made Tech fittings may not work as well. But as far as I know, the Dalbello boots work in Dynafit and other bindings. Of course some boot and binding combinations may be a bit more difficult to step in, but once in, work properly. You can email us with the specific Dalbello boot you have and look into it, help@skimo.co

Yes. Same frequencies and fully compatible the Mountain model.

Hi Brian, not there because it hasn't been sold separately. I haven't ever even taken one apart. The original 2.0 version didn't have a centering tab, it turned freely. A bit more difficult to step in, but works perfectly well.