Can I Use an Electric Blanket With a Waterproof Mattress Protector? We regularly get asked, at this time of year, if a waterproof mattress protector can be used with an electric blanket, and should it be put over, or underneath the electric blanket? The answer is simple: Yes, you can use a waterproof mattress protector with an electric blanket! Our advice is to put the electric blanket on the ma … read more