Casper mattress review – we take a look at this plush memory foam mattress

This bed-in-a-box is one of the best but if you need further convincing that the Casper mattress is for you, read on for review (and the best prices!)

Casper Mattress in bedroom with box
(Image credit: Casper)
Real Homes Verdict

Soft enough to enjoy that ‘aaaand relax’ experience when you first climb in, but still supportive. The top layer is an open-cell foam that provides immediate bounce and has cooling properties. If you suffer from back pain you might find it comfier to sleep on your back.

Reasons to buy
  • +

    Cool, comfy foam

  • +

    Brilliant customer service

Reasons to avoid
  • -

    Usual chemical smell, but it does fade… very, very slowly

Why you can trust Real Homes Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

If you've heard about the bed-in-a-box phenomena, then it's likely you've heard about the Casper mattress. We wanted to see if it lives up to all the hype so we tested it (you're most welcome) and put together this detailed Casper mattress review to help you decide if this is the mattress for you.

The Casper comes out in third position on our best mattress  guide, and we rate it highly for its optimal level of firmness and overall support. By having my husband Nick reviewing an array of mattress (such a tough job) alongside me, I've been able to create a balanced view of what each mattress is like for both men and women. We conducted some semi-scientific testing and tapped in to all the spec details and more to know who the Casper mattress will suit and if it's worth the money! We really put these mattresses to the test, so scroll down to read about the Casper and to feel confident in your choice when you go to buy your mattress online.

Be sure to read all our deep reviews ahead of choosing the best mattress for you!

Casper mattress at a glance

Firmness: it rates as medium.
Sleep position: it suits side and back sleepers.
Your weight: it's suitable for people of average and above average weight.
Motion transfer: fidget next to you? You won't feel it.
How it feels: supportive but soft.
Sizes: single to super king.

Click the link Casper mattress to buy if you're already convinced, or discover the latest Casper mattress deals in our review below.

Casper mattress specifications

Why you can trust Real Homes Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

Type: Comfort foam/memory foam
Sizes: Single, small double, double, king and super king, available in UK and EU versions

  • Following recommendations made by the British government in July 2019 to eliminate TCPP as a fire retardant, Casper have introduced the UK's first TCPP-free hybrid mattress – the Hybrid

Who will the Casper mattress suit?

Can you use an electric blanket with a Casper mattress?

Nights are definitely chillier now autumn is here, which might make you wonder whether you can use an electric blanket with this Casper mattress. Although breathable, meaning you won't get too warm in bed like you might have with the original memory foam mattresses, we still find modern memory foam topped mattresses quite warm to sleep on. However, if that's your idea of heaven, you'll be happy to know it's perfectly okay to top your Casper with an electric blanket. 'You can absolutely use an electric blanket with any of your Casper products!' says the company (dog beds excluded we suspect...).

  • This is a real crowd-pleaser. There’s even a Casper bed for your dog!
  • Perfect for anyone seeking memory foam with a bit of bounce
  • Medium firmness fans who, as we've said above, like a bit more bounce than sink-ability;
  • Hot sleepers: it might be memory foam, but it's breathable;
  • Side sleepers and joint pain sufferers;
  • Fidgets or anyone with a fidgety partners: you'll hardly know they're there;
  • Apartment/flat and small home dwellers: it's a bed in a box, so it's easy to deliver to the bedroom.

Casper mattress

(Image credit: Casper)

What's the Casper mattress like to sleep on?

The first thing I noticed when laying on the Casper was that it has a little more give than other memory foams. It is marketed as ‘not too soft and not too hard’, and that’s a pretty accurate assessment. Think of it as the Goldilocks' Choice mattress – just right! Both Nick and I found it pretty comfortable when sleeping on our sides, backs and fronts (plus starfish, in my case). Being squishier, it also offers more comfort on your bottom and lower back when propped up on the pillows reading, or enjoying breakfast in bed. (Sadly the latter only now happens when Nick is plotting to escape to a rugby match.)

Most foam mattresses seem to score well on motion transfer compared to springs. The Casper is no exception and absorbed the impact of Nick flailing around in his sleep very well. If I wore earplugs, I could quite happily forget he was in the bed at all. 

casper mattress firmness test

(Image credit: Casper)

As mentioned, this is a medium mattress on the firmness front and you definitely feel your body sink into it, but not drastically. There’s no need for a rescue team on standby. Happily, concerns that the slight sinking factor would lead directly to Sweatsville proved unfounded – and this was during a particularly hot and muggy week. Our half-dozen tame testers (three male, three female, ranging from 10 to 17 stone) gave it mostly fives for firmness (see graph above), which is slap bang in the middle of our one to 10 scale. And they all made positive remarks about its comfort, too. Evicting them from my bedroom wasn’t as speedy as I’d have liked!

The weight test (below) confirmed that this is indeed a squishy number, with the laser marking between 9 and 10cm – the top of our scale. The centre was only marginally deeper, which indicates fairly equal support across the full surface of the mattress. Despite having a super king, I often find myself clinging to the edge of the mattress at 2am so this is a definite bonus.

weight test for casper mattress

(Image credit: Linda Clayton)

weight test for casper mattress

(Image credit: Linda Clayton)

Regarding posture, we both felt well supported by the Casper, and this could be due to its zoned support layer, which is designed to reduce pressure on the shoulders and hips. Our laser test shows a slight dip in Nick’s spine (see below) but it wasn’t enough that he felt cranky in the mornings. Pressure relief when sleeping on our backs was equally impressive, if not more so. The foam seemed to fill the void in my back and supported my lumbar region (lower spine) well. In fact, we had a cabinetmaker friend with fairly significant back issues house-sit for a week, and he said the Casper wasn’t comfortable (even a little painful) when lying on his side, but when he turned onto his back it was better than the orthopaedic mattress he has at home.

posture test for casper mattress

(Image credit: Linda Clayton)

How does the Casper rate online?

On Amazon, the majority (77 per cent of 84 reviewers) give it the top five-star billing. 

Over at Trustpilot things aren't quite as rosy, with 32 per cent of the 34 reviews rating it ‘bad’ – the main complaints mention sagging and smelliness. We haven’t noticed the former and while there was a very strong chemical smell for the first few days, it did fade. The noxious odour issue appears universal across memory foam products.

What do you get for your money?

A 10-year warranty, free delivery and returns, plus very good customer service – it’s hard to find a review that doesn’t applaud Casper’s ‘Snooze Specialists’ (cheesy moniker notwithstanding). Look out for discount codes on the Casper website – typically around 15 per cent.

Is the Casper mattress worth it?

All the foamy layers, zone support and breathability (etc) sound impressive but in reality all you need to know is: what does it feel like? Our verdict is soft enough to enjoy that ‘aaaand relax’ experience when you first climb in, but still supportive. You don't feel your bones creak when you get out in the morning, even if you’re over 50, like Nick, or someone who spends far too many hours hunched over a screen, like me! We would both happily recommend this mattress, but if you suffer from back pain you might find it comfier to sleep on your back.

Casper mattress fillings

This is a four-layer mattress that is all tucked neatly within a soft cover – the top zips off for easy cleaning. The top layer is an open-cell foam that provides immediate bounce and has cooling properties that I can certainly vouch for. Next is a high-density memory foam layer, which supports your pressure points. The Transition Layer deals with even weight distribution, and the final layer acts as a supportive base that helps keep everything stable. Foam nerds might enjoy this video covering the science behind the Casper mattress’ construction. 

Do Casper mattresses last? 

The Casper mattress will last a long time. It's a really sturdy and firm product so you can tell that it will last at least the full seven years that you can expect to keep a mattress for before you should definitely invest in a new one.

Ordering and delivery

  • Ordering is super easy with online tracking and, for £20, you can pick which day you’d like. 
  • The delivery peeps will carry it into your bedroom, unpack and take back the packaging. For an extra £15 they can also spirit your old mattress away. 
  • Not only does Casper offer the now standard 100-day free trial but, if you order it direct from, they’ll also come and pack it up and remove it from your bedroom if you’re not happy, which is actually quite a bonus given how heavy and unwieldy mattresses can be. 
  • The redundant mattress is then either recycled or donated to charity – bless them! 

More mattress reviews to check out:

About our review – and our reviewer

Linda Clayton has been writing about homes and interiors for nearly 20 years, working for publications such as Homes & Gardens, Country Homes & Interiors, Real Homes, Ideal Home, Livingetc and House Beautiful. Linda and her husband spend between five and 10 nights sleeping on each mattress. Find her on Twitter at @lindaclayton and  @lindaclaytonwrites on Insta.

Looking for more mattress options?

Linda Clayton

Linda is a freelance journalist who has specialised in homes and interiors for the past 19 years, beginning on a trade rag for the Daily Mail Group and now writing full-time for the likes of Homes & Gardens, Livingetc, Country Homes & Interiors, and of course Real Homes. Linda is our resident mattress reviewer. She spends at least a week on every mattress she tests for us, as does her ever-patient husband. In reviewing mattresses for us for more than a year, she has become something of a very opinionated expert. She lives in Devon with her cabinetmaker husband, two daughters and many pets, and is locked in an on-going battle to drag their red brick Victorian home out of 1970s swirly-carpet hell...