Originally Posted by tanscrazydaisy
but... from what I been told, by a pedorthist (one of the brain childs behind the America's Best Bootfitters program... that sponsors this site)... that the mechanics are different in a ski application than a running/walking application, thus the orthotic will be different.
This. There's some semantic trickery here. Real orthotics are not just footbeds. They're to correct biomechanical problems we have during foot motion, and that'll depend on the kind of motion. Which is very different in running than in skiing. Also, the correction may feel odd if we're not doing what it was designed to compensate for. But the distinction is generally meaningless since what you buy in a running or skiing store is, in fact, just a footbed. We've become conditioned to the idea that we all have feet that need help, that it's "natural" to use a molded footbed for a sport. Uh huh.
The place to go to find out if our feet need something beyond a bit of simple cushioning, and whether that's some generic arch support or a Rx for a real orthotic, is an ortho's office, not a running or skiing store.