There are numerous reasons that people decide to purchase a waterproof mattress protector. For parents with small children, it helps protect the mattress from bed-wetting. For people with incontinence, a waterproof mattress protector gives them peace of mind knowing that their mattress is protected in the event of an accident. Some people who have allergy issues may also choose to use a waterproof mattress protector. Others just want to ensure that nothing will damage their mattress. With the large selection of mattress protectors on the market, how does someone choose one? Much of that depends on personal preferences and needs of the buyer. Here are some common questions and answers to address the issue of how to choose the right waterproof mattress protector.