Amazon’s cooling king mattress topper Prime Day deal is so good, it puts Black Friday to shame

The Tempur-Pedic Tempur-Adapt + Cooling Mattress Topper with a blue Prime Day deals badge in the foreground. — (Image credit: Tempur-Pedic)

If you're a side sleeper looking to make your king mattress softer and cooler, Amazon has the deal for you. Right now, you can pick up a king Tempur-Pedic TEMPUR-Adapt + Cooling Mattress Topper for $341.40 at Amazon, saving you over $150.

While Tempur-Pedic produces some of the best mattresses on the market, its Tempur-Adapt + Cooling Mattress Topper is currently this year's best mattress topper thanks to its mattress-softening comfort for side sleepers.

Tempur-Pedic Tempur-Adapt + Cooling Mattress Topper: king was $499 now $341.40 at Amazon
Crafted from 3" of Tempur-Pedic's famous Tempur material and including a machine washable cool-to-touch cover, our Tempur-Pedic Tempur-Adapt + Cooling Mattress Topper review testers felt this plush, body-cradling topper is best suited for those with hard beds and side sleepers. All sizes are reduced for Prime Big Deal Days but the king-size has the biggest discount; 32% off, bringing the price down to just $341.40 (was $499) — but that ends today. You'll get a ten-year limited warranty and a 30-day free return period.

Our review: ★★★★½
User score: ★★★★ (4.1/5 based on 11,820+ reviews)

Why should you buy the Tempur-Adapt + Cooling Mattress Topper?

Possibly the biggest benefit of the Tempur-Pedic Tempur-Adapt + Cooling mattress topper is that it allows you to experience the brand's proprietary, slow-response, body- hugging Tempur Material foam, without splurging on an entire mattress from the brand (although if you are tempted, keep an eye on Tempur-Pedic mattress sales).

The plush, cradling comfort this topper provides is best suited to side sleepers, even soothing hip pain for some of our testing panel. We also felt that it lives up to its cooling claims, with a cover that is cool-to-touch and helped our lead tester avoid the nightsweats they'd been experiencing prior to trying out the Tempur-Adapt + Cooling topper.

What's more, this really is a great deal on the king size, even beating out the deal we saw last Black Friday, which is typically when the biggest discounts are found. So if you've been looking for a way to add an extra layer of comfort to your king-size bed or increase the cooling capabilities of your bed, grab this Tempur-Adapt + Cooling mattress topper before the deal ends.

For more great discounts be sure to check out our Amazon Prime Day deals live blog right now.

TOPICS

Frances Daniels is a PPA-accredited journalist and Sleep Staff Writer at Tom's Guide with an MA in Magazine Journalism from Cardiff University. Her role includes covering mattress and sleep news and writing sleep product reviews and buyer's guides, including our Best Hybrid Mattress 2025 guide. She is interested in the relationship between sleep and health, interviewing an array of experts to create in-depth articles about topics such as nutrition, sleep disorders, sleep hygiene, and mattress care. She is also our specialist on mattress toppers — producing bed topper reviews and taking care of our Best Mattress Toppers 2025 guide — and leads content relating to fiberglass-free beds for a non-toxic sleep. Outside of Tom's Guide, she has written for Ideal Home and Marie Claire.

With contributions from