We've listed our favorite Prime Day mattress deals that someone on our staff has tested themselves and personally vouches for. Keep an eye on all the Prime Day sales going on, as we are doing lots of live coverage to keep you informed. For more on WIRED's sleep coverage, check out our guides to the Best Mattresses, Best Organic Mattresses, Best Mattress Toppers, and Best Sheets. Fresh With Green TeaCourtesy of Amazon Zinus Green Tea Memory Foam Mattress (12-Inch) $272 AmazonI know matcha lovers everywhere just perked up, and yes, the Zinus 12-inch green tea memory foam mattress does indeed contain green tea. And, as luck would have it, the 12-inch, twin-size version is what's on major sale for Prime Day.