There are a lot of mattresses to pick from. It doesn't have to be overwhelming. Shopping for a mattress online can be less costly than buying in-store (not to mention, more convenient), and most brands offer extensive sleep trials for you to test out their products before committing. The process can still be overwhelming, especially when you’re on the hunt for one mattress to fit your specific needs. That’s why the experts at Sleeping Expert tested hundreds of options to find the 12 best online mattresses for all kinds of sleepers.