Is it a bad idea to buy a mattress without a box spring?
Generally speaking, your box spring receives as much wear and tear as your mattress over the years but it’s harder to see. In all likelihood, if your mattress needs to be replaced, so does your box spring. If you don’t replace your box spring, you may find that your new mattress does not wear as long because it’s not getting the support it needs. If problems occur later, the manufacturer may void the warranty.