And should these once sloshy sleep solutions make a comeback? To the uninitiated, waterbeds are (you guessed it) mattresses filled with water. Originally crafted from vinyl, these water-filled ...

Aly Lopez is a writer on the sleep team at CNET. She tests, researches and reviews everything sleep-related, from mattresses and bedding to sleep trends and hacks to sleep technology and supplements.

Here at CNET, we’ve spent years rigorously testing a wide range of mattresses, so we know how to spot the ones worth your money. We also know not all mattress brands are created equal.