Yes, you do. You always need a protector on top of your mattress. If you don’t have a waterproof protector, you could be exposing your mattress to stains, moisture, and even microbe development. Not only can this make for an unhealthy sleep. It can also void your warranty and cost you hundreds of dollars if you ever need repairs.
Mattress protectors aren’t just a way to preserve your mattress. They can also enhance the cooling properties of your mattress. Protectors might include cooling gel inserts or breathable bamboo viscose fiber. They could also have copper infusions to fight bacteria as well as increase conductivity to keep you cool.