One of the biggest Prime Day mattress deals you’ll want to shop is this Tuft & Needle Original Limited Adaptive Foam Mattress, which is currently $284 off. Made from two layers of memory foam, the mattress is designed to provide cushioned support and exceptional cooling all night long. This is because the upper foam layer is infused with graphite—a porous mineral that absorbs moisture—and cooling gel, which work together to wick away warmth and keep you comfortable no matter how sticky your room gets. The second layer of the mattress provides durable support as you sleep, contouring to your body while keeping it in proper alignment. It’s designed to be medium-firm, meaning it has a comfortable amount of give when laying on it, but not enough to make you sink in and feel stuck. This limited-edition Tuft & Needle mattress also features an anti-microbial fabric called HeiQ HyPryoTecht, which helps guard the mattress from bacteria growth and odors. Because of this, you won’t have to worry about mold, fungi, or other harmful bacteria deteriorating your mattress, causing stains, or creating nasty smells. To buy: From $487 (was from $695); amazon.com. “I have severe back problems that require several more surgeries,” one reviewer wrote, adding, “After letting [the mattress] expand for 24 hours, I slept on it for the first time and have loved it ever since. I saved a ton of money, and despite having two broken ribs, [I] can’t even feel the pressure points.” “My partner and I were both waking up a lot [in the night] and each had to see chiropractors for pain in our backs,” another reviewer said, adding that they spent “countless hours” researching different mattresses to find the right one. “[We] finally took a chance on this one and it has changed our quality of sleep significantly. No more waking up in the middle of night and no more wasted hours to get quality sleep.” Save hundreds on the Tuft & Needle Original Limited Queen mattress from now until midnight PT on July 13, and stay up to date on all the best Prime Day deals here.