What do you use for Mattress protection?

I use a rubber sheet that I place a towel over so I do not stick to the rubber

I use a reusable and washable pee pad that is only 3' square. They are very absorbing and hold a lot of pee. It has 3 layers, the top layer is some and comfy pulls in the pee and the middle layer is wicking and absorbent and retains the wet and the bottom layer in water (pee) proof and does not let and wetness through and has a no slip backing so it stay put. The pad is surprisingly thin and I use it under my bed sheet and hardly noticeable. So when I pee in my bed, it feels just like peeing in a normal bed, but the mattress never gets wet or stained.

Don't use any mattress protection. So far my bed doesn't smell like pee. When I do get new bed will get something for it.

I've used a nice fleeced mattress cover that had vinyl on one side. That's the side I would leave up (easier to clean in case I leak). That developed a leak so now I have a vinyl mattress protector from Walmart. I've got 6 mil plastic runners from the bed to the bathroom so if I leak on the way it does not stain the carpet. Once my enema session is over all the protective stuff is cleaned up and put away until the next time.

Full vinyl zippered cover. And reusable chux 6'x3' on couch and sometimes bed when having lots of issues. Or as in recently...on hotel beds

I have a full mattress protector on my bed it fully protects against any leaks and it rustles as i get into bed it reminds me that i am still prone to leaking at times

I have a hospital bed so mattress came waterproof. good itea as I have yet to find a disposable that does not leak at the sides when I sleep on my side.

I have a full bed mattress protector and on my side of bed a rubber sheet under the mattress pad and then I sleep on a reusable bed pad.