Siena memory foam mattress is cheaper than Black Friday epic 4th of July Amazon sales

A woman sits on the edge of the Siena Memory Foam Mattress in a bedroom, testing the edge support of this cheap gel memory foam mattress. A Tom's Guide lowest price deals graphic in the right corner — (Image credit: Future)

The Siena Memory Foam Mattress is always excellent year-round value for money, but a new 4th of July mattress sale makes it cheaper to buy today than it was during Black Friday. You can buy a queen 10" Siena mattress for $278 at Amazon.

After rigorous mattress in-house testing, the Siena Memory Foam Mattress has proved itself comfortable and supportive bed for all budgets. We rate it as one of the best memory foam mattresses you can buy online right now and the best cheap mattress overall.

Siena Memory Foam Mattress: twin was $199 now $149 at Amazon
In our Siena Memory Foam Mattress review, our side and back sleepers were pleased with the full-body support of the Siena all-foam mattress. So was our lone stomach sleeper, who liked that her hips didn't sink below the rest of her body. It did take a few nights for the mattress to soften slightly, though, to give that memory foam 'hug'. We always rate the Siena is the best mattress for under $400, but the current Amazon discount makes it even cheaper. The 10" Siena mattress is now $278 (was $349) for a queen size at Amazon — that's not a typo, just an exceptional mattress sale. And Siena's usual perks (we're talking a 180-night sleep trial and 10-year warranty, which are standard in the mattress industry) are still included.

Our score: ★★★★
User score: ★★★★½ (600+ reviews)

Prefer a hybrid mattress? The Premier is on sale too...

Siena Premier Hybrid mattress: twin was $299 now $249 at Amazon
Although the memory foam Siena is comfortable in all sleep positions, combination sleepers might prefer a bouncy, responsive sleep surface, like that delivered by the 10" Siena Premier Hybrid mattress, to help them move between positions through the night. This mattress comes in three firmness levels at Amazon (plush, medium and firm) — an option that usually only comes with luxury rather than budget beds (that's why we rate it as one of the best hybrid mattresses you can buy right now.) With up to 25% off this mattress, a queen size sits at $402.54. This is only a marginal extra saving compared to the Siena mattress sale we usually see (a queen Siena Premier Hybrid usually sells for $424), but $20 is still a saving.

Our score: ★★★★
User score: ★★★★½ (60+ reviews)

Eve is a sleep tech product tester and writer at Tom's Guide, covering everything from smart beds and sleep trackers, to sleep earbuds and sunrise alarm clocks. Eve is a PPA-accredited journalist with an MA in Magazine Journalism, and has four years’ experience writing features and news. In her role as Sleep Tech Product Tester and Writer for Tom's Guide, Eve is constantly trying out and reviewing the latest sleep products from brands such as Apple, Garmin, Whoop, Hatch, Sleep Number, Eight Sleep, and Oura. A fitness enthusiast who completed the London Marathon earlier this year, Eve loves exploring the relationship between good sleep, overall health, and physical performance, and how great sleep tech can make that relationship even better.

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