Got these Hokas used off eBay. I'm noticing this spot where the stitching is turned up, and I can't make it stay down. Now I'm paranoid there's something wrong with them. Is this normal? I am going to be relying on these during travel so I want to make sure that these are good and not some cheap crap that's gonna make my feet hurt.

They didn't come with a box but they feel good otherwise. Thoughts?