Bedclothes that provide a cover for a mattress(noun)
WordNet. Princeton University. 2010.
Use "mattress cover" in a sentence
"How to Double-Make a Bed 1. Put on the plastic mattress cover 2. Put on the fitted sheet and top sheet 3. Put on another plastic mattress cover 4. Put on another fitted sheet and top sheet 5. Complete the bed with blankets and bedspread pottytrain your child in justoneday 4. potty party prerequisites laying the foundation for success"