EIGHT SLEEP POD 3 COVER
Smart mattresses are increasingly common, but you can also convert your existing mattress by using a cover like this one, which slips on like a fitted sheet. Not only will it track sleep and health metrics such as sleep stages and heart rate, it can set each side of the bed to a temperature you can choose using an accompanying app on your phone. The Pod 3 cover can also heat up or cool the bed quickly whenever you want and makes getting up in the morning easier thanks to gentle vibrations and a gradual temperature change. $1,645.