So, you’re finally ready to toss out that saggy old mattress and buy a new one. You’ve even decided what size you want and are ready to start shopping. However, do you know which of the different types of mattresses is right for you?

There are three common mattress types: innerspring, foam, and airbed. Of course, not all mattresses of a certain type are the same. Some are made with low quality materials, while others are top of the lin…