What We’ve Learned About Mattress Firmness, Thanks to Our Mattress Smasher 9000

With CNET’s one-of-a-kind device, our sleep experts have objectively tested the firmness levels of nearly 100 beds so far. Here’s what we’ve found. Our sleep experts have been lying on mattresses for years — some members for eight years at this point. Having tested around 350 beds from dozens of … 

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