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Emma Diamond Hybrid Mattress Review


Quick verdict: As promised, the Emma Diamond Hybrid Mattress delivers on comfort and support but its temperature regulation wasn't particularly notable.


  • Amazing cushioning and support
  • Easy unboxing and assembly
  • 100-night trial and 10-year warranty

  • Multi-layers mean some fitted sheets fit a little tight and are hard to put on

In this guide

  • Review
Emma Diamond Hybrid Mattress review

I'm one of those people who has put off investing in a new mattress for some time now. In fact, the one I was using had already celebrated its 10th birthday. While it had moulded to my body quite nicely, it was definitely too soft and was no longer giving me the support I needed.

It's safe to say I had to get a new mattress, so when I was given the opportunity to try the new Diamond Hybrid mattress from Emma, I could not say no. Here's exactly what I thought of it after testing it for a few weeks.


As I mentioned, this is the first new mattress I've used in my adult life. The unboxing process has changed a lot in the last 10 years.

The Emma mattress arrived in a slim, rectangular cardboard box. I had yet to experience the magic of a "mattress-in-a-box", so I was pretty excited to get it all opened up.

The Emma mattress slid out of the box and unravelled itself with very little work on my end. I thought it was going to be a strenuous activity but I was pretty impressed – it was ready to be used in a matter of minutes.

Also, I didn't smell any weird odour (which can sometimes occur with a new mattress).

Emma mattress

Marina Tatas/Finder

Now, what's so special about the Emma Diamond Hybrid mattress? What makes it different from others on the market?

Emma has recognised that in order for you to reach the ultimate deep sleep, your body temperature needs to be not too hot and not too cold. The technology used in this mattress is designed to help you achieve and maintain a regulated body temperature throughout the whole night.

The top layer of the mattress features foam technology infused with graphite particles and a graphite coating underneath. These work together to constantly dissipate excess heat.

The middle layer consists of an adaptive comfort foam that moulds to your body and provides pressure relief. The final and bottom layer is formed with HRX foam, offering additional support.

Emma Diamond Hybrid review

Marina Tatas/Finder

My bed frame only fits a double size bed, so that's what I went with. Emma also provides sizes for single, king single, queen and king.

In saying that, I did have some trouble putting on my fitted sheet (which is made for a double bed). I did make it fit in the end, with some extra push, but it still fit a little tight. The mattress height is approximately 25cm, which is taller than my previous one – so that's something to keep in mind if you've invested in a particular set of sheets.

What's it like to sleep on?

Emma Diamond Hybrid review

Marina Tatas/Finder

One of my favourite factors about this mattress is its comfort level. I can honestly say that I've never experienced such a comfortable and supportive sleeping environment before – hotel beds included.

However, it took me several nights to get used to it and my sleep was quite uncomfortable for the first few nights. Apparently, this is normal when you're transitioning to a new mattress but it did have me a little worried.

My previous mattress was incredibly soft (and old). So the Diamond Hybrid mattress was a shock to my body but, ultimately, it was one that I needed. My body got used to the new sleeping environment pretty quickly and now I hate having to leave my bed in the morning.

In terms of how well the mattress actually worked to regulate my body temperature, it was hard to tell. I tested the mattress in winter, so it wasn't hot enough to make a noticeable difference. However, if you're a hot sleeper and you find the Diamond Hybrid isn't cooling enough for you, you can always take advantage of Emma's 100-day free trial to send it back and try something else.

It also comes with a 10-year warranty, which Emma claims is the typical lifespan of a mattress.

Should you buy the Emma Diamond Hybrid Mattress?

  • Buy it if: You’re looking to invest in a supportive mattress and tend to overheat when you sleep.
  • Don't buy it if: You're looking for something affordable.

Overall, I give the Emma Diamond Hybrid Mattress 4.5 out of 5 stars. I appreciate the advanced technology used in this mattress, and all the materials used to ensure you get the best deep sleep of your dreams.

While I love how supportive and comfortable this mattress is, I did shave half a star off the rating due to it being a struggle to put on my fitted sheet.

Also, the double size retails for $1,499, which I wouldn't consider affordable and is more expensive than other similar styles on the market.

However, Emma regularly offers discounts and savings so it could be worth waiting for one to come around to secure your purchase.

Pricing and availability

How we tested

To test the Emma Diamond Hybrid Mattress, our reviewer used it every night for a few weeks, comparing it to other mattresses they've slept on in the past.

The author has spent several years reviewing a variety of products including beauty products, sneakers and luggage.


Mattress size & weight

188x92x25 cm | 20 kg
King Single
203x107x25 cm | 23 kg
188x138x25 cm | 27 kg
203x153x25 cm | 32 kg
203x183x25 cm | 40 kg

Construction and Materials

Diamond Degree Graphite Foam | Adaptive comfort foam | Pocket springs | HRX foam
Mattress cover
Removable and washable, the top of the cover is made of 99% polyester and 1% elastane, the bottom is made of 100% polyester, and the base is made of 87% polyester and 13% polypropylene.

Images: Marina Tatas

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