7 big Prime Day cooling mattress topper deals ending tonight — beat the heat from just $38

The Helix GlacioTex Premium Mattress Topper on a mattress in a light bedroom with a Prime Day deals badge in the foreground.

(Image credit: Future)

There are still plenty of sleep deals around as Prime Week comes to an end, so what better way to enjoy a comfier night for less than by picking up a cooling memory foam mattress topper in the sales?

Amazon is still full of Prime Day discounts on bed toppers, but many brands behind this year's best mattress toppers (and top-rated mattresses) are hosting their own rival sales, too. Budget brand Lucid has now launched a 30% off sitewide sale, which means you can now buy a Gel Memory Foam Mattress Topper for as low as $37.49.

Cooling memory foam mattress toppers provide the soft, body-hugging comfort of memory foam without the stuffy heat-trapping tendencies. So I suggest grabbing these mattress topper deals before this month's Prime Day mattress sales come to an end.

1. Lucid Gel Memory Foam Mattress Topper: twin was from $49.99 now from $37.49 at Lucid
As soon as Prime Week started, Lucid kicked off its 30% off sale, and it's brought some absolute bargains. We hailed Lucid's signature foam topper as the best cheap bed topper in our Lucid Gel Memory Foam Mattress Topper review, as its ventilated design and heat-drawing gel infusion offer great temperature regulation for the price. We think this sitewide sale will end when Amazon's does, so grab a 2" queen size for $52.49 (down from $69.99) while you still can.

4. Helix Premium Mattress Topper with GlacioTex: twin was $373.33 now $272.54 with code TOMS27 at Helix
At 3.75" thick, this hybrid topper impressed reviewers in our Helix GlacioTex Premium Mattress Topper review with its comfort-boosting thickness and excellent cooling features. Its cover is made from heat-dissipating GlacioTex (often found in the best cooling mattresses) and its layer of microcoils improves airflow. Thanks to our exclusive TOMS27 discount code, a queen is now down to $364.03 (was $498.66).This Helix mattress deal is set to end soon, though.

5. Casper Comfy Mattress Topper: twin was $199 now $159.20 at Casper
Okay, I admit this isn't billed as a cooling mattress topper per se, but just read our Casper Comfy Mattress Topper review. This topper's perforated foam and soft-knit cover was more than enough to keep testers cool, and it's a great alternative to buying one of our picks in our best mattresses for side sleepers guide. Oh, and did I mention that it's hardly ever more than 10% off? So this Prime Day-rivalling 20% discount that reduces a queen to $239.20 (was $299) is a big deal.

6. Tempur-Adapt + Cooling Topper: twin was $329 now $279 at Tempur-Pedic
While the original Tempur-Adapt Topper was super comfortable, testers found it slept rather warm. However, this cooling upgrade (which costs an extra $60) gave testers for the Tempur-Pedic Tempur-Adapt + Cooling Mattress Topper review much cooler sleep with the same amount of comfort. There's now a 20% off sale at Tempur-Pedic, taking a queen to $359 (was $429). (You could also try the 40% discount code TOPPERS40, which sometimes gets me 40% off if I'm lucky.)

7. Sleep Innovations Cooling Comfort Gel Memory Foam Dual Layer Mattress Topper: twin was $109.99 now $75 at Amazon
Sleep Innovations' Dual Layer Mattress Topper is insanely popular on Amazon, with 4.4 stars and 32,000+ ratings. This half-foam, half-pillow-top hybrid topper is a bestseller that comes in three different models, but we suggest going for the Cooling Comfort model if you want to cool down your mattress. A queen size is now 23% off and down to $115.99 (was $149.99) in Prime Day deal.

See more Mattress Deals

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 hugely interested in the relationship between good sleep and overall health, interviewing a wide array of mattress and sleep experts to create well-informed articles about important topics such as nutrition, sleep disorders (from sleep apnea to night terrors), lucid dreaming, sleep hygiene, and mattress care. She is also our specialist on mattress toppers — producing mattress topper reviews and taking care of our Best Mattress Toppers 2025 guide — and takes the lead on all content related to fiberglass-free mattresses for a clean, non-toxic sleep. Outside of Tom's Guide, she has written for Ideal Home, Homes & Gardens, and Marie Claire.

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