Casper mattress discount: enjoy 20% off site-wide with this discount code

Use the Casper mattress discount code for 20% off any size mattress you'd like! Prices start from only £220 – wow!

Casper mattress discount: mattress on bed with box
(Image credit: Casper)

In search of a new mattress? This Casper mattress discount code can help you score one of the best mattresses in the world, for a great price. Dreamy. So, right now, using the discount code below, you can take a lovely 20 per cent off everything at Casper – no matter what size mattress you choose! – thank you mattress gods.

This deal ends soon, on the 3rd March at 29:59pm. Hurry to shop! 

Use the links below to jump to what you want to see.

Not sure if you can buy a mattress online without trying it first? Read our Casper mattress review for a more in-depth look – it comes with a 100-night free trial and a 10 year warranty to ease your mind further.

Head to our mattress deals page for more incredible offers.

The best Casper mattress discount of the week

Casper | 20% off site-wide
In celebration of this year's leap year, you can use the code SLEAPDAY at checkout to bag a decent saving. This discount code will work on all size and type mattresses, however, it excludes the Casper Glow Light. Happy shopping! Deal ends 3rd March.View Deal

Casper mattress pricing

Casper Mattress

(Image credit: Casper)

Casper mattress specs

The best mattress you can buy for all types of sleepers

Specifications
Filling: Comfort foam/memory foam
Sizes available: Single - Super king (including EU sizes)
Depth: 24cm
Comfort grade: Medium
RRP: £400-£800
Warranty: 10 years
Trial: 100 nights
Reasons to buy
+Cool, comfy foam+Brilliant customer service
Reasons to avoid
-Usual chemical smell, but will fade

These are the current cheapest prices of each size Casper mattress, and since there are two other mattresses – an Essential and Hybrid version – we’ve listed their cheapest prices, too. We've popped the cheapest option first.

The Essential mattress:

  • Essential single mattress: £275 £220 at Casper
  • Essential small double mattress: £375 £300 at Casper
  • Essential double mattress: £400 £320 at Casper
  • Essential king mattress: £450 £360 at Casper
  • Essential super king mattress: £550 £440 at Casper
  • Essential EU single mattress: £300 £240 at Casper
  • Essential EU double mattress: £425 £340 at Casper
  • Essential EU king mattress: £500 £400 at Casper

The Casper mattress:

  • Casper single mattress: £400 £320 at Casper
  • Casper small double mattress: £550 £440 at Casper
  • Casper double mattress: £600 £480 at Casper
  • Casper king mattress: £700 £560 at Casper
  • Casper super king mattress: £800 £640 at Casper
  • Casper EU single mattress: £450 £360 at Casper
  • Casper EU double mattress: £650 £457.20 at Amazon
  • Casper EU king mattress: £750 £600 at Casper

The Hybrid mattress:

  • Hybrid single mattress: £500 £400 at Casper
  • Hybrid small double mattress: £750 £600 at Casper
  • Hybrid double mattress: £800 £640 at Casper
  • Hybrid king mattress: £900 £720 at Casper
  • Hybrid super king mattress: £1,000 £800 at Casper
  • Hybrid EU single mattress: £550 £440 at Casper
  • Hybrid EU double mattress: £850 £680 at Casper
  • Hybrid EU king mattress: £950 £760 at Casper

More Casper mattress deals

10% off mattresses
Discount code above not working? Try LIFEWELLSLEPT at checkout for 10% off. This means you can save £80 on the Casper mattress or up to £55 on the Essential mattress. It also works on accessories when you’re purchasing a mattress.View Deal

Refer a friend, £50 off for them and a £50 Amazon voucher for you
Have a friend who’s in the market for a new mattress, duvet or bedding set? Refer them to the Casper website and they’ll get £50 off their first order while you’ll be thanked with a £50 Amazon gift card. Start spreading the snooze.View Deal

100-night free trial
Buying a mattress online can be nerve wracking, we know. Luckily, though, Casper offers a 100 night free trial, so that if you’re not getting on with the mattress after 99 nights of sleeping on it, you can send it back free, and you’ll get a full refund. This is also the case with the pillows and bedding sets.View Deal

Free delivery
No matter what you purchase on Casper, whether it be a super king size mattress or a pillowcase set, it all comes with free delivery. Even more of an excuse to shop, we think.View Deal

10 year warranty
Purchasing a mattress online comes with several doubts, this is why  customers who shop at Casper can be rest-assured they're buying a good quality product. The Casper mattress comes with a 10 year warranty should anything disappoint.View Deal

Casper Mattress accessory prices

Award-winning mattresses aren’t all Casper sells: there’s a range of pillows, duvets, mattress protectors, night lights and even dog beds. Find all products below.

Casper Pillow | RRP: £65-£75
Available in standard (50 x 75cm) or super king size (50 x 90cm), the Casper pillow perfectly complements any mattress. The pillow is filled with polyester microfibre, lined with polyester fabric and features a 100% cotton cover. It also has a three year warranty.

Casper Duvet | RRP: £190 - £320
Made from a mix of merino wool and ethically sourced down, the Casper duvet is available in four different sizes. Featuring a 100% cotton shell, the duvet features sewn-in chambers to keep the filling in place. It’s also OEKO-TEX® 100 certified so safe for babies and children. It comes with a one year warranty and a free 100 night trial. You can also machine wash it on cold and tumble dry low.

Casper Mattress Protector | RRP: £70 - £95
The only way to protect any mattress from spills, dirt, and wear and tear, the Casper mattress protector is made from a mix of polyester, spandex, nylon, and polyethylene. It’s waterproof and breathable, too. It also comes with a one year warranty and a free 100 night trial.

The Casper Bed Sheets | RRP: From £175
The Casper bedding is available to purchase all together or separately. A pillowcase set starts from £40, a fitted sheet from £45, and a duvet cover from £70. Made from premium Supima® cotton found in California’s Central Valley, the bedding is 400 thread count, and super soft. The fitted sheet also features an elastic tie so you can guarantee it won’t move around during the night. Psst, there’s also a one year warranty on them.

Casper Platform Bed | From £900
Available in five sizes and made from powder-coated, aircraft-grade aluminium beech wood (slats) and plastic, the Platform Bed comes in two different colours. You can also add a headboard. This bed frame comes with a five year warranty and a 30 night free trial, too.

Casper Adjustable Base | From £550
Compatible with any flexible foam mattress, the Casper Adjustable Base has three different height options. Made from a mix of solid wood and steel, you can raise either your head or feet to ensure your sleep is more comfortable. It also comes with a three year warranty and a 30 night trial.

Casper Glow Light | From £109
Not only is the Casper glow light self-dimming, but it’s designed to lull you into better, deeper sleep. It also makes waking up in the morning easier and fills the room with soft light. It’s wireless, too There's a one year warranty and you can try it for 30 nights.

Casper Nightstand | £200
Available in two different colours, the Casper Nightstand arrives assembled and is made from medium-density fibreboard, aluminium and plastic laminate. It also comes with a five year warranty. Ideal for those going for a clean, modern look in their bedrooms.

Casper Dog Bed | RRP: £115 - £210
Because your furry friend deserves a comfy place to sleep, too, the Casper Dog bed comes in three different colours and three different sizes. Made from pressure-relieving memory foam and durable support foam, your pup will love it, but if they don’t, you can get your money back before 30 days. It’s also easy to clean, keeps its shape and has a one year warranty.

More mattress deals