Looking for a comfy bed for less? Siena has you covered, with some of the cheapest memory foam mattresses you can buy. The brand's Spring Savings event offers up to 50% off cheap mattresses, with prices starting from just $149. Our recommended deal gets you a twin-size Siena Memory Foam Mattress for just $179 ($529 MSRP) with an offer on a bedding bundle worth up to $399, now just $99.
Since its launch, this budget all-foam bed has been discounted to an incredibly affordable price. The initial deal took $200 off all sizes, which then increased to $300 off all sizes. While the current evergreen discount takes up to $400 off the Siena Memory Foam Mattress, it should be noted that the MSRP (or 'Total Value' as Siena styles it) has been increased since then, with the full retail price of a queen rising from $699 to $769, so the actual savings have not changed in some time.
The Siena Memory Foam Mattress is the best mattress of 2025 for those with a tight budget. After extensive testing, we called this mattress a great choice for side sleepers and fantastic value for money.
This flagship product isn't the only mattress in the Siena line worth considering and every mattress sold by Siena comes with a 10-year warranty, a 180-night sleep trial, and free shipping and returns. Here are the best Siena deals you can shop right now...
The best Siena Mattress deals this month
How much is a Siena Mattress?
The MSRP on Siena mattresses have risen in recent years, but the discount prices appear to be evergreen. This is how much the Siena Memory Foam Mattress costs this month:
| Header Cell - Column 0 | MSRP | Sales price (March 2025) |
|---|---|---|
Siena Memory Foam Mattress (twin) | $529 | $179 |
Siena Memory Foam Mattress (twin XL) | $594 | $269 |
Siena Memory Foam Mattress (full) | $684 | $314 |
Siena Memory Foam Mattress (queen)) | $769 | $359 |
Siena Memory Foam Mattress (king) | $976 | $449 |
Siena Memory Foam Mattress (Cal king) | $976 | $449 |
Siena mattress sales FAQ
What does our Siena Mattress review say?
To conduct our thorough Siena Memory Foam Mattress review, our panel of mattress experts tested the Siena Memory Foam Mattress for a whole month to get an accurate idea of what it's like to sleep on. We found the 10" all-foam bed to be of outstanding value for money (it tops our best cheap mattress guide) and has strong edge support. We were also impressed with its temperature regulation, as it kept our lead mattress tester remarkably cool, especially when considering it's made from memory foam, which can be prone to trapping heat.
It is also surprisingly firm for an all-foam bed, and we rate as 9 out of 10 for firmness, which contradicts Siena's self-reported 6 out of 10 rating. The firmness means it delivers great support to back sleepers and it's our budget pick for best mattress for stomach sleepers, but it may be far too firm for some. In fact, our side-sleeping testers found it way too hard.
Are Siena mattresses good for all sleepers?
The Siena Memory Foam Mattress is particularly good for back and stomach sleepers, but side sleepers may find it too firm. The bed's 9 out of 10 firmness rating (firm) means that it provides optimal support to back and stomach sleepers, who need to prevent their hips from sinking so their spine stays healthily aligned. Lightweight and side sleepers, on the other hand, will find this firm bed too hard along the pressure points in the shoulders and hips.
Do you need a coupon to buy a Siena mattress?
You don't need a Siena Sleep promo code to claim your savings when there's a Siena mattress deal, as all discounts are automatically applied at checkout. Plus, our price comparison technology is constantly pulling in the lowest prices from around the web, so you can be sure you're getting the best Siena deal available.
Can you return a Siena mattress?
Yes, both free shipping and free returns are available when you purchase a Siena mattress. Siena offers a 180-night mattress trial, and a full refund will be given if you're not satisfied with your new bed before the 180-night period is up. This period allows more than enough time to get you through the expert-recommended three weeks.
When is the best time to buy a Siena mattress?
An evergreen $400 off deal at Siena Sleep takes 50% off most sizes, so you don't have to be too strategic about when you buy the Siena Memory Foam Mattress. However, during Sleep Awareness Week in March 2024, we saw Siena take 60% off all sizes of their signature bed, bringing a queen size down to $379 instead of its usual $399 discount price.
It's also worth waiting to see whether there are further price drops around holiday sales events, such as the upcoming Black Friday mattress sales and Cyber Monday mattress deals in November, and the Presidents' Day mattress sales in February.
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