You can't just have a mattress protector, though. You need a good one. You need one that works well--in other words, it is water-proof. A mattress protector that leaks through the mattress doesn't really protect said mattress. You need one that can be washed. Yes, washed in the washing machine. No one wants to hand-wash one of those dirty things.
I also must have it able to be dried in the dryer. Sure, sometimes you have time to air dry. Other times you have a puking child and need it dry 10 minutes ago.
We have always owned mattress protectors. We have also always purchased nice ones that cost a lot of money. We have also had issues with them not really being waterproof, or more often, them literally falling to pieces in the dryer because I stand firm that something like this should be able to go in the dryer, so I don't read labels, and they were "hang dry only."
So I went on the hunt for a mattress protector that would fill my criteria. I found one!
I have tested it for about a year (I can get distrustful once something fails me, so this thing needed to prove it could be used and washed). Sometimes being a little OCD crazy like me can pay off. Last week, I finally decided this mattress protector had proven itself and went to order a couple more. They were on super sale!
It is on sale for $14 for a twin size. So I bought four.
If you are in need, you should get it! You can't beat that price, and the item is 100% worth that cost.