Resoleing them requires specialized equipment, or at least nontypical knowledge on how to do it. There is a woman out of Portland that does it. Boilerroom shoe repair. Last I checked, solovair didn't have the resole option available on their site. But it's been a while since I've checked.
Ended up switching to Chelsea's just because I'm hoping I dont have to jump through hoops to get them repaired.
They both use the same tech, so both are relevant as far as I know. I only own Solovair though, so I'm not sure about Docs