The two fabrics/layers separate a lot so they're only good for store runs, good buy anyway since winters coming fast it gets pretty cold here in Missouri gotta bundle bundle bundle. I advise getting bigger size than you're looking for, that's what I did and they fit as if I got the size he wears now so I guess they're a tiny bit on the small side but I planned for that or for him to grow into.
They also slip in a little note that says if you leave a 5 star review they'll send you a free pair - probably why it has such a high star rating