User blog comment:Griever0311/Ask A Marine Part Deux/@comment-1260687-20100318034554

@G1n032: Yes you can join if you have flat feet; it used to be you couldn't because all the boots were made the same, but now you can have inserts and shit, so it's okay. I would recommend a nice-ass pair of running shoes after he gets out of boot camp if he goes in, though - I had the same problem, my feet are flat as fuck.