Our analysis of how well a mattress maintains its original shape, height, firmness, and side/back sleeping support after 8 years of simulated use. A measure of how much vibration is transmitted ...

For Serta Black Friday deals you can shop the Perfect Sleeper mattress collection and save up to $500 off select variants.

But here’s why you really care, or should. Right now, through December 8, you can save up to $500 off select Perfect Sleeper mattresses from Serta thanks to a huge mattress sale. Getting $500 ...