How firm is a firm mattress

Every mattress firm will tell that theirs is the best firm mattress. But what do you need? Firm mattress? Extra firm mattress? Cushion firm mattress? The problem is that if you test one out in the store, it may feel good, but after hours on your feet in a showroom you might be happy with a block of cement. Since mattresses are generally big investments, make sure yours comes with a warranty and is returnable within a few weeks. You can also often have the company haul away your old mattress when your new one is delivered.