Sleeping. It's something that we do for about one-third of our life. Think about all the things we spend money on that we use a few times a week, a couple of times a year, or even just once in a lifetime. Shouldn't we make a good investment in something like a mattress that we spend so much time on? The challenge in shopping for a mattress today comes in understanding all the different brands of products, sizes, and designs that are available.