Brandyn has orthotics because he has very flat feet. The skin on his feet is extremely tight and thick so I think that has a lot to do with it. The orthotics don't irritate his skin at all because he wears socks with them but he can only wear them when the weather is cool. He overheats easily and the orthotics/socks make it happen almost immediately in the summer.
All the best, I hope that helps
My name is Morgan. My son Brandyn was born on 26th June, 2008 in Sydney, Australia as a collodion baby and has been diagnosed with lamellar ichthyosis.