21 cm (8.2 inches), 25 cm (10 inches), or 30 cm (11.8 inches)
What makes this mattress special?
Original NASA-approved memory foam
Price from £ 249 (499 )
The Emma Original is an award-winning mattress and one of the UK's most popular choices.
Get an exclusive Sleep Hero discount code when you sign up for our newsletter.
~ The UK's best-selling mattress.
This bestselling mattress by the award-winning Emma brand offers 3 layers of premium foam and soft comfort, with sufficient support and stability.
One of the oldest bed-in-a-box mattresses on the market
What is a memory foam mattress?
Memory foam may sound like a new-age phenomenon, but it's actually been around for quite a few decades.
NASA first designed it as a pressure-absorbing material to cushion astronauts' seats and absorb impact during space travel. 🚀
And how did this space-age material end up in mattresses?
Well, you have Tempur to thank for that, who started playing around with memory foam in mattresses back in 1991.
Tempur memory foam mattresses are still some of the best in the world, though a bit on the expensive side.
We can recommend much more affordable ones!
Today, memory foam mattresses are very popular - especially in the form of bed-in-a-box mattresses.
We'll tell you why a little further down. 😉
What is memory foam?
In a nutshell, memory foam (also often called viscoelastic polyurethane foam or low-resilience polyurethane foam) is a foam made predominantly of polyurethane and a few additional chemicals to increase viscosity and density.
Memory foam is characterised by its so-called memory effect or memory imprint.
When you apply pressure to the foam, it leaves an imprint that will remain visible for a few seconds.
Look at the images below that demonstrate this memory effect.👇
This memory effect allows the memory foam to adapt remarkably well to the body, resulting in body-hugging comfort and support.
Memory foam also responds to temperature.
The foam will be firmer when cold and soften up when warmer.
As you warm up while sleeping, the foam will become softer and mould to your body even more.
This is great if you're looking for that body-contouring support.
But, in poorer quality mattresses, this can quickly become problematic.
As poorer quality memory foam mattresses respond slower, they may take a while to react to your body and bounce back to the original shape.
If you're a very heavy sweater, though, we'd recommend opting for a pocket sprung mattress or a hybrid mattress(with foams & springs) instead.
The spaces between the pocket springs create natural ventilation channels, which allows air to flow more freely.
This enhanced breathability and airflow keep you cooler and more comfortable. ❄️
The Simba mattress is one of our favourite hybrid mattresses, but we can also recommend the Silentnight Eco Comfort Pocket 1200 Mattress as an eco-friendly - and budget-friendly - pocket sprung option.
We have an affiliate relationship with some manufacturers, where we receive a commission on sales if you click over from our site. This does not affect the purchasing price. In contrast: By using our discount codes, you'll get the best deal possible.
Looking for the best deal? We track all discounts, vouchers, and coupons so that you will always get the best price through our site, no matter which mattress or product you end up choosing.
Get EXCLUSIVE coupon codes when you sign up to our newsletter.
Success! Please check your spam folder for our confirmation e-mail.
Oh no, there was an error during e-mail registration.
We're a team of sleep enthusiasts and experts. We test hundreds of sleep products - mattresses, pillows, toppers, bed frames, and more! - to provide you with the best reviews. Our mission is to help you make the right choice for your sleep. Read more about us.