Select smart beds are aimed more at medical or mobility issues they can help you sit up more comfortably, or elevate your head slightly to combat snoring, back pain, or acid reflux. Others deliver dual-zoned heating, cooling, or firmness adjustment, usually by pumping air or water in or out of the bed. Some will provide the kind of data you would expect from a fitness tracker, providing personal insights into your own sleep health.

If you’re wondering what makes a smart mattress smart, it is a term used to describe any mattress or bed (the two are used interchangeably) that contains in-built tech that, depending on models, you may be able to customize using your smartphone.