Should be from the school so that they are the same, they have a system for storing the mattresses as well! I'd say just get them from the school and save yourself the trouble. In my case, they return the covers to wash. Check if they do the laundry for you so you can anticipate your monthly expenditure.
mostly mattress for the little 1 at child care will be purchase from school .as I believe school would want all the same for storing all mattresses . plus u can save all trouble .
The mattress has to be from the school. Some schools require you to purchase the covers , wheras others don't. If its under the Misc, then ill say just purchase it.
thanks