For serious play, I have a leather one which I particularly bought because it doesn't have a single strap that um, goes up the butt, it has two straps which go around your legs and is MUCH better at transmitting feeling and way more comfortable. Something to think about.
I know some vegans and such have an issue with leather, but this IMO is the best. Especially if you have no butt as you say, it may stay on better? I got it here in the States from a site called JT STOCKROOM.
Have fun! 😀