i use the non prescription. Well, the doctor suggested some certain ones but i couldn't find them so i just bought the cheapest one i found. It's made of like plastic. it dosn't have a bar but it's hard material so it works the same way. It's pretty good, if i tighten it it feels nice. but wearing the brace doesnt fix all. i guess my right hand has muscle wasting now. cause it feels weak. and i'm 27 years old but i have skinny marfan-like hands and i think that contributed to the problem. i see alot of kids starting music intruments since young and they don't get CTS even as adults. lucky them