I have an autistic sixteen year old who seriously lives for his pool, but I'm having a heck of a time finding an inner tube pool float that is comfortably his size. He's a big guy (think xxl swimsuit) and he's probably 5'10 or 5'11 right now, so even the "bigger" inner tubes are a bit tight on him and he has a hard time getting balanced in them. This is the first pool in five years that's deep enough for him to float in and he was super frustrated today that our old inner tubes didn't work for him anymore. He doesn't use speech to communicate reliably, so I don't want to switch him to another kind of float if I don't have to because I know inner tubes work for him, and surely they must make them with a bigger interior area, right? He really just likes to either put his butt in the center and float, or put his body through the center and float. Anyway, if you have any suggestions or recommendations, I'd really appreciate it. Thanks!