I review mattresses for a living and these are the Prime Day deals that are actually worth buying

There are plenty of Amazon Prime Day mattress offers around – these are the ones that are worth considering, and the ones you should avoid

Emma Essential Prime Day Deal
(Image credit: Emma)

Update: These deals are over now. Sorry. For the cheapest current prices, head to our roundup of the best cheap mattress deals

Amazon Prime Day is here! If you're wondering whether 2021's best Prime Day deals include some big mattress bargains, I am here to help. As Wellness editor on T3, I spend a lot of time testing out mattresses, as well as a lot of time keeping an eye on mattress prices. There are quite a few mattress deals kicking around this Amazon Prime Day – in this article, I'll go through the ones that I'd actually recommend, as well as those that you should buy not from Amazon, and the ones I'd probably avoid. 

Not all big mattress brands have an Amazon range. The two that do, that I'd recommend taking notice of, are Simba and Emma – the maker of T3's best mattress and best memory foam mattress respectively. If you're happy to move away from the trendy brands, another range to look out for is Silentnight, which sells a number of mattresses through Amazon, at very competitive price points.

If you want to buy from a brand that doesn't sell through Amazon, head to our best cheap mattress deals page, where you'll find the biggest discounts across a range of mattresses. 

A quick reminder before we start: you have to be a Prime subscriber to claim these deals. Sign up below (you can always cancel the trial if it turns out not to be for you):

Emma Prime Day Deals: are they any good?

Emma's mattresses are already cheaper than most other big, trendy names, and represent great value for money even at RRP. The Emma Amazon range includes the Emma Original, the two Emma Hybrids, but also an Emma Essential. You won't find that final model on the Emma website – it's an Amazon-only offering from what I can tell. It's a simpler, and cheaper, version of the Original, with just two layers of foam. There are plenty of Emma mattress deals all year round, so here's what you need to know about the current Amazon ones. 

Emma Original
T3's top pick

Emma Original | was from £449, now from £227.37 at Amazon | 50% off all sizes
The Emma Original is our favourite Emma mattress. It includes three layers of different foams, to offer an excellent balance of softness and support. The build quality is also high.

Is it a good deal?

Yes! This is the biggest discount we've ever seen on the Emma Original. You can get 42% when you buy direct from Emma, with the code SuperT3, but this Amazon offer is obviously quite a bit bigger...

Should I buy it?
Yes. By my reckoning, it's the best mattress offer in the Prime Day sales. It's the best memory foam mattress around, and punches above its price tag in terms of quality, even at full price. It traps heat a bit, so if you tend to sleep very hot, perhaps check out one of the Simba deals below, though. Head to our Emma Original review to find out more. 

Emma Hybrid mattress

Emma Hybrid mattress| was from £589, now from £330 at Amazon | 45% off all sizes
The Emma Hybrid has the same memory foam layers as the Original, but adds a layer of springs. This layer is thin, so doesn't offer much bounce.

Is it a good deal?

Yes. 45% is the most we've seen knocked off this mattress, and it's rare to see such a big price drop. If you'd rather buy from Emma direct, use the code SuperT3 to knock 42% off.

Should I buy it?

Perhaps. All of Emma's mattresses are good value for money, in terms of quality. I reviewed the Emma Hybrid and found it very comfortable. There are two potential down-sides to be aware of: first, it sleeps on the warm side. Second, I found it slightly lacking in hip support if you typically lie on your back. Because the springs don't bring much bounce, I'd probably recommend the Emma Original instead. 

Emma Original Hybrid

Emma Original Hybrid - King Only| was £1059, now £648.41 at Amazon |Save £410.59 (39% off)
The Emma Original Hybrid is the most recent addition to the Emma lineup, and adds a tall layer of springs, as well as those excellent foams you'll find in the rest of the range. The discount is only on the King size. 

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Is it a good deal?

No: if you want to Emma Original Hybrid, you should buy it direct from Emma, where you'll get 43% off with the code SuperT3. A 43% discount is worth taking advantage of – anything over around 41% off is a good price drop. Also, this Amazon deal is only on the King size.

Should I buy it? 

Perhaps (but you should go direct to Emma and use the code SuperT3 if you do). I haven't slept on the Emma Original Hybrid – one of our Wellness reviewers is just set to start testing one, so there'll be a review to follow. It would stand to reason that the bigger springs will offer more bounce than I experienced with the Hybrid, and they should promote better airflow too. If it's a hybrid you're after, I think this one looks good, and as with the others, the build quality with Emma mattresses is reliably high.

Simba Prime Day deals: are they any good?

The Amazon Simba mattress range includes all three of the core range you'll see at Simba direct. It also includes a selection of models you won't see on Simba's own site. 

Amazon, unsurprisingly, tends to discount these Amazon-only models more heavily than the core range, and that's true this Prime Day, although really there are very compelling discounts all round. While we see lots of Simba mattress discounts throughout the year, today's offers undercut all the ones we've seen. Read on for a rundown of the ones worth paying attention to.

While you're here, I'd also urge you to check out the discounts on Simba sleep accessories, all of which are pricey at RRP, but excellent quality.

SImba Hybrid Pro
Best luxury mattress deal

Simba Hybrid Pro mattress| was from £929, now from £584.35 | 37% off all sizes at Amazon
The Simba Hybrid Pro is a luxury hybrid that combines springs and foams into one sumptuously comfortable mattress. It won the T3 Award 2021 for best mattress.

Is it a good deal?

Yes! This is the biggest price drop we've seen on a Simba mattress, surpassing last year's Black Friday offer (35% off). It's also a fair bit cheaper than the saving you'll make if you buy from Simba direct.

Should I buy it?

If you can afford it, absolutely. It's obviously quite an investment, but we absolutely loved this mattress in our Simba Hybrid Pro review. This one has a soft sleep surface above a much firmer lower layer – if you want something with a more consistent feel, try the Hybrid Luxe (although, fair warning, that one is even pricier).

Simba Hybrid Luxe

Simba Hybrid Luxe - King and Super King| was from £1,799, now from £1,169.35 | 35% off at Amazon
The Simba Hybrid Luxe is the newest addition to the range, the 'most advanced' and the one with the most layers (10!). It's ridiculously comfortable. These Prime Deals are only on the UK King and Super King models. 

Is it a good deal?

Yes – although the deal is only on King and Super King, so if you want a smaller one you should head to Simba direct where there's 30% off everything. The Hybrid Luxe has only very recently been added to Amazon, and it hasn't been around long enough to have comparison prices from previous shopping events, but Simba hasn't, that I know of, offered a over 35% on its core range, and it's rare to see that big a price drop. It does have a slightly smaller percentage price-drop than the rest of the core range, though. 

Should I buy it? 

Absolutely, if you can afford it. I tested out the Simba Hybrid Luxe myself, and it's probably my favourite mattress. The reason it's not at the top of our best mattress guide is because it's so expensive at full price, and also because we really, really liked the Pro too. If you're deciding between the two, the main thing to be aware of is that the Luxe has a more consistent sleep surface feel (rather than a soft top layer on a firm lower layer found in the Pro) and that overall it's firmer than the Pro. 

Simba Hybrid mattress

Simba Hybrid Original mattress| was from £609, now from £364.80 | 37% off all models at Amazon
The Simba Hybrid has been around the longest, and it's the cheapest and simplest model in the Simba range, with 5 layers of foams and springs. It has 12 industry awards to its name.

Is it a good deal?

Yes. We have seen this offer before, but not frequently, and Simba doesn't, to my knowledge, ever offer discounts more than 35% off. It's also a much better price than you'll see at Simba direct right now, where there's only 26% off for new customers.

Should I buy it? 

Maybe. The others in the Simba range are better in terms of both support and cooling, although obviously the prices do reflect that. We liked it a lot when we tried it, although noted that it might be too soft for some. Head to our Simba Hybrid mattress review to find out more. 

Simba Hybrid Essential

Simba Hybrid Essential| was from £500, now from £300 | 40% off all sizes at Amazon
The Hybrid Essential is a simplified version of the core range, and it's only available at Amazon. Compared to the Hybrid Original above, there are fewer springs, and no layer of 'high definition foam with edge support'. It's 5cm shorter, too, at 20cm tall.

Is it a good deal? 

Pretty good. This one's Amazon only, from what I can see, so you won't find a lower price elsewhere. It does have fairly regular price drops, and it was cheaper last Prime Day, when 49% got knocked off, but typically we don't see such big discounts.

Should I buy it? 

Perhaps not. I haven't tested this one out, but in the reviews, it looks like a few customers had issues with the mattress developing troughs over the course of a few months. If you can stretch you budget, I'd stick to the core hybrid range.

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Simba Comfort| was from £250, now from £149 | 40% off all sizes at Amazon
The Simba Comfort mattress is an Amazon-only, foam-only model that has been zoned to improve spinal alignment when sleeping and support pressure points.

Is it a good deal?

I think so. I've seen fairly offers of up to 35% off on these models, but none of 40%. There's no denying it's very cheap.

Should I buy one?

We haven't reviewed any of the memory-foam only Simba models, so I can't say personally. Based on the price and design, I'd say this is a spare room mattress or temporary option rather than a permanent investment for the main bedroom. It's perhaps a good basic option if you're on a tight budget – although you could also check out our best cheap mattress picks if that's your remit.

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Simba Premium foam boxed mattress| was from £315, now from £189 | 40% off all sizes at Amazon
The pricier of Amazon's two foam-only Simba models. Like its even cheaper sister model, it's zoned to add extra support where needed.

Is it a good deal?

I think so. I've seen vouchers for 30% or even 35% off this mattress quite frequently, but never a 40% price drop. 

Should I buy one? 

We haven't tested any of this range, so I can't give a personal recommendation. The difference between this and the cheaper Comfort model seem minimal (I think there might be more 'zones' and a different cover?). The review ratings are decent, but again I'd say this is at best more of a spare room mattress option.

Silentnight Prime Day mattress deals

Silentnight sells a nice wide selection of mattresses through Amazon: the Eco range, Geltex range, memory range, and rolled range. That encompasses springs, hybrids and memory foam models. Are Silentnight mattresses any good? Well, at T3 we haven't reviewed all of them by any means, but our Silentnight Studio Eco review and Silentnight Studio Original review are both very positive. 

You might have to sacrifice things like removable covers and side handles on these mattresses, and you won't get the 'trial period' you'd find when buying direct from newer brands, but the price point might make all that worthwhile. I'd certainly be more than happy to buy one as a spare room mattress. 

My pick would be the Silentnight Eco 1200 or 1400, which comes in a few variants, with up to 49% off. 

Silentnight Studio Memory mattress

(Image credit: Silentnight)

Amazon Prime Day alternative sales – UK

Amazon Prime Day alternative sales – US

  • Best Buy – massive savings across every department
  • Dell.com – save big on notebooks, desktops, monitors and more
  • eBay.com – big discounts in the eBay Brand Outlet
  • Home Depot – save on Fall furniture, smart home devices and more
  • HP – save up to 30% on select products
  • Lowes – save up to $500 on select appliances
  • Lenovo – Semi-Annual Sale brings deep discounts to gaming laptops, student laptops and more
  • Microsoft – Surface and Xbox deals plus Microsoft Store Exclusives
  • Newegg – get your computer parts for less this October
  • Nordstrom – new markdowns, up to 40% off!
  • Target – Target Deal Days Sales Event takes on Amazon Prime Day
  • Walmart – Big Save Event from October 11 through October 15
Ruth Hamilton
Ruth Hamilton

Ruth is T3's Outdoor and Wellness Editor. She writes for a variety of design and lifestyle brands, and was previously Deputy Editor at Creative Bloq.