What is a mattress protector?
Mattresses can be protected from water damage by having a protector put on the bed underneath the sheets. The protection is enhanced further if you use one with elasticated edging to wrap around the corners of the mattress.
Choose this one, a lightweight breathable polycotton with a waterproof layer inside to prevent water leaking through to the mattress. Elasticated edges wrap snugly around the corners keeping the sides protected from damp and moisture too. You’ll find this is a worthwhile investment if there are issues of incontinence to deal with.