These Mattresses Passed Our Editors' Rigorous Tests—And They're Up to 30% Off Today Only

"I scoured the internet in 2019 as a broke twenty-something, and Zinus was the most affordable mattress I could find. Five years later, Zinus's Green Tea mattress remains one of the most affordable mattresses out there. And as the more than 110K five-star reviews suggest, the low price doesn't mean low quality," Digital Deputy Editor Katelyn Lunders says. "I slept on my Zinus mattress for five years, and it never sagged. If anything, it became more comfortable with time. The only potential reasons you might not love it as much as I do are if you prefer a softer mattress or the bouncy feel of a hybrid or coil mattress to the isolated memory foam feel. But if you're looking for a quality mattress that won't break the bank, I cannot personally recommend this bed-in-the-box mattress enough." Read her full review on the mattress here.

If you've heard of Tuft & Needle, but aren't quite sure what "Nod" means, allow us to enlighten you: The Nod by Tuft & Needle is a foam mattress available exclusively on Amazon, which means, like all other Amazon brands, it is supremely discounted on Prime Day. Take this adaptive foam bed, for example, which is $76 off, making it just a touch over $400. Worried a mattress that cheap can't possibly hold up? Just let one of the nearly 4,000 five-star reviews convince you otherwise.

One customer wrote, "I don't usually update reviews, but honestly, I am so happy with this purchase that I thought I should share! I have now had the mattress for a full six months and love it just as much as I did when I first purchased it. I have also had friends sleep over, and they've pointed out how comfortable it is. I do rotate the mattress regularly when I change sheets and have not noticed any dipping (this was what I was most afraid of), but I'm also single and can sleep wherever I want on the king mattress. I would definitely buy it again!"

As we said, you can't go wrong with a hybrid mattress because you get all of the benefits of both springs (airflow, support, and durability) and memory foam (sag-free and minimized motion transfer). Plus, for under $100, you'd be remiss not to get it. Don't take our word for it, though. You can trust the 99,000 five-star ratings, one of which said, "I was hesitant to buy a mattress online, but it worked out great. I opened it around 6 AM and went to bed at 11 PM, but the mattress had fully expanded in less than three hours. The mattress is firm, and I love it."

Yes, we included two Tuft & Needle mattresses on our list because it's just such a good brand. This mattress is CertiPUR-US certified and comes with a 100-night sleep trial, which we'd consider a serious win. You can buy it during Prime Day at a major discount and then return it if you aren't completely obsessed with it. We think you will be, though, because this mattress comes with more than 11,000 five-star reviews. One happy customer said, "Because I had a traditional spring mattress, it has taken me a while to get used to the memory foam of this one, but it is very comfortable and supportive. I have had the mattress for a month now and can honestly say that I am sleeping better every night."

Purple is not a cheap brand. More often than not, even the twin sizes can cost more than $1,000. Of course, there are exceptions! One such exception is Prime Day, when thousands upon thousands of luxury goods are discounted. Case in point: The Purple NewDay mattress ordinarily retails for $1,200 on both Purple's site and Amazon. It happens to be on sale at both outposts, but it's more than $20 cheaper on Amazon, so if you want to get it, get it here, with free shipping in two days. One reviewer said, "I love the fact that it has taken away a lot of pain. I can get out of bed easier, but it is so comfortable I want to stay in bed."