Reddit reviews Brute Nylon Wrestling Knee Pad Color: Black, Size Large

There's basically two types:

Brute-style Neoprene kneepads

They've been around forever and used to be the most popular by far. I think they're less popular now. These were the first pair I owned, and I've tried several of the other types of kneepads, and just couldn't get used to them, and always returned to these. Brute has the original, but there are lots of similar pads made by others now.

Puffy volleyball-style kneepads

Also have been around forever, but were generally marketed towards volleyball players not wrestlers. I could never get used to them, but some people swear by them. One thing to note is that these tend not to slide as much as the neoprene pads. Some people like that, some don't.