I Review Mattresses for a Living—Here Are 6 Worth Buying During Prime Day

If you’re looking for a Goldilocks balance of comfort and support—especially if you have back problems—now is the time to add this Casper element to your cart. It’s engineered with a top layer of memory foam to relieve pressure points and the medium-firm construction prevents sinking and sagging with a durable base foam. One happy Amazon shopper shares, “I find this mattress to be medium firm, which is good for me, since I have back problems and need support but don't want to sacrifice comfort while on a budget.” She also appreciates that it’s noise-free and great for couples, noting, “The mattress doesn’t make a lot of noise when we [fool around], unlike those with bed springs.” And with a 100-night trial and free returns, what do you have to lose?

What does sleeping on a five-layer memory foam mattress feel like, you ask? Imagine “the ideal ratio of softness, firmness and support,” per the brand. Side sleeper, back sleeper, stomach sleeper—whatever your sleep style, you’ll find the comfort you need in this bed’s sweet spot between soft and firm. Not to mention, it boasts a therapeutic gel memory foam layer that's specifically designed to hit pressure points from your shoulders to your legs to promote ideal spinal alignment. Hot sleepers, meanwhile, will be won over by the fact that it "ensures body heat gets distributed evenly throughout, which is a total game changer," as one PureWow editor shares in her full review of the Nectar mattress. It also touts minimal motion transfer (shout-out to that foam stability base!), so you and your partner can stop waking each other up in the middle of the night. All that for under $300? Now that's a dream come true.

ICYMI, the latest cooling mattresses are infused with a layer of green tea (and moisture-wicking charcoal) to help dissipate heat and keep your bed smelling and feeling fresh. And aside from the cooling benefits—plus the elimination of odors, which can get trapped in memory foam over time—this mattress is a top pick for anyone with a unique sleeping style. It includes 12 inches of thick, layered memory foam, which is designed to individually conform to your sleep style and provide adaptive support where you need it most. “I'm usually a side sleeper, and I used to wake up a lot throughout the night because of pain in the back and neck with my old bed. With this Zinus mattress, my sleep quality improved so much. I wake up refreshed and my back pain is relieved! I love it that it's firm to support my body but also soft to make me comfortable,” one Amazon reviewer explains.

This memory foam mattress has a 4.5-star rating with more than 50,000 reviews for its ultra-plush composition. The hybrid is designed for anyone who prefers a sinkable feel—and it’s available in five heights that allow you to customize your thickness level. It also combines traditional coils with high-density gel memory foam for restorative lumbar support, and layers of super soft foam are topped with a feathery quilt. One delighted reviewer writes, “Crafted by the angels, it feels like a cloud once you lay down upon it,” and praises its balance of softness and support: “It has the comfort of softer beds without the backaches and the firmness of a giant hand cradling your tiny body.” 

The main draw to this mattress is that it’s great for every kind of sleeper. The new and improved version of Serta’s OG perfect sleeper features 825 individually wrapped coils and a classic quilted top, making it supportive yet sinkable in the areas you need it most. So much so that Rachel Gulmi, former operations director of branded content, called this mattress her sleep fairy godmother in a PureWow100 review. “I’m what’s classified as a combination sleeper, meaning I shift positions throughout the night from side to back. This mattress actually responds to my body as I move around.” On the flip side, if you’re someone who sleeps in only one position, Serta also has tons of customizations to complement your needs. Think: the choice between a firm, plush or medium pillow top and standard, enhanced or ultimate options for extra coils.

There’s a reason couples love this firm mattress: "It is so comfortable for me and my husband when one of us needs to get out of bed. I was afraid we would sink in the foam, but nope! Super comfy. The mattress popped into shape within 15 minutes and was ready to go," one reviewer says. This is because it's an Amazon-exclusive model that features the same Tuft & Needle Adaptive® foam as the brand's other mattresses, just without the graphite and cooling gel. In other words, it offers pressure relief, support and breathability at an unmatched price (compared to other models from T&N). To that end, multiple reviewers back that it's also great for the kids' room: "We bought two of these mattresses for bunk beds. They worked wonderfully—very plush! My daughter has slept fine, and it is very soft and supportive to lie on."