Seemingly every holiday brings mattress sales—now including Amazon's big day. Here are the best Prime Day mattress deals we've found on beds we've tested.

I'm a sleep writer, so I know how important it is to invest in your rest. A good luxury mattress should provide an exceptional sleep environment, especially as you can typically customize the bed to suit your needs. And in the 4th of July sales you can save on premium sleep, with deals like $400 off the Lux Estate at Stearns & Foster.