SALE ALERT: This Cooling Mattress Is 20% Off Today Only on Amazon

If you've been waking up with a sore neck or back pain, it's a sign that it might be time to upgrade your mattress. While there aren't any hard and fast rules on how often you should replace your mattress, the National Sleep Foundation says the best way to tell if you need a new mattress is how well you're sleeping.

Look out for sagging spots, worn edges, and areas that feel less springy or firm than others. Checked some or all of these boxes? You definitely need a new mattress. Fortunately for you, Amazon's Deal of the Day is this Sweetnight 10-inch Gel Memory Foam Mattress, which you can snag today for $350.04—that's 20 percent off!

The Sweetnight 10-inch Gel Memory Foam Mattress is made with four supportive layers: The first layer is two inches of gel-infused memory foam, followed by an inch of ventilated comfort foam to provide a cooling effect. Then, there's five inches of a comfort foam to support to your joints and spine and encourage equal distribution of weight. The last layer is three inches of a high-density support foam to prevent sagging and promote durability.


10-Inch Gel Memory Foam Mattress

Sweetnight $438.00

$350.04 (20% off)

What's more, this mattress is CertiPUR-US, which means its foam is made without harmful chemicals and materials, such as formaldehyde, mercury, and other heavy metals. It's also designed with a breathable cotton fabric, so hot sleepers can snooze soundly at night—no more night sweats! On the comfort scale, this mattress is medium-firm and can be flipped and rotated.

Not convinced you need one? Amazon users are raving about this mattress. "I tend to be overly warm at night, but I have been comfortable since I got my new mattress. As in much more comfortable. I love, love, love my new bed. I would buy this again in a second," wrote one Amazon customer.

Another reviewer says, "The first night I slept on this mattress, I slept so well I was 30 minutes late to work the next day!"

So what are you waiting for? Order one of these cooling mattresses today! Be sure to also check out these other amazing bedding sales. Sweet dreams await.

Gel Memory Foam Pillow with Removable Cooling Cover



Cooling Mattress Topper



Pure Stone Washed Linen Bed Sheet Set



Cooling Weighted Blanket



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Tiffany Ayuda, a senior editor at Prevention and certified personal trainer through the American Council on Exercise, has specialized in fitness, health, and general wellness topics in her previously editorial roles at Life by Daily Burn, Everyday Health, and South Beach Diet.