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Best Mattresses under £300

If you’re shopping for a mattress under £300, it’s easy to end up with something that feels great for a month… then caves in or starts sagging. We’ve done the digging to help you avoid that. This guide is based on real user reviews, honest forum advice, spec comparisons, and hands-on testing. Every mattress we’ve picked is £300 or less (based on double size) at the time of writing and comes from a trusted brand.

Note: Prices can fluctuate. Always double-check the latest deal.

Silentnight Sofia 1200 Mirapocket mattress on a pink divan base in a stylish bedroom

SleepSoul Comfort 800 Pocket Mattress

4.8/5 (227 reviews)

– Medium Firmness
– 800 Pocket Springs
– Reflex Foam
– Hypoallergenic & breathable
– 10-Year Warranty

Ideal for: Side sleepers, couples, allergy sufferers

Sizes: Single, Small Double, Double, King

From £169 on MattressNextDay (Price may vary)

Image of Silentnight Amsterdam mattress on a grey divan base in a neutral bedroom

Silentnight Amsterdam Miracoil Ortho Mattress

4.2/5 (1,424 reviews)

– Extra Firm
– Miracoil Spring System
– Orthopaedic Support
– Breathable and Cool
– Hypoallergenic

Ideal for: Side sleepers, back pain sufferers

From £218.75 on Amazon (Price may vary)

Silentnight Miracoil Orthopaedic Mattress on a grey divan base in a light grey bedroom

Silentnight Ortho Dream Star Mattress

4.8/5 (108 reviews)

– Extra Firm
– Miracoil Springs
– Eco Comfort Fibre
– Zoned Support
– Hand Tufted

Ideal for: Back pain sufferers, back/side sleepers, eco-conscious buyers

Sizes: Single, Small Double, Double, King, Superking

From £239 on MattressNextDay (Price may vary)

Best Double Mattress Under £300

Silentnight Amsterdam Miracoil Ortho Mattress

 

If you want a double mattress that’s firm and durable, this one’s a standout. It sits at the higher end of the budget but delivers quality and support, especially for those who sleep on their back or suffer from joint pain.

Real Amazon Review: “Very firm, supportive and comfortable for my bad back.”

 

Pros:

  • Extra firm support for back alignment
  • Silentnight brand reliability
  • Allergy-friendly materials

 

Potential cons:

Best King Size Mattress Under £300

SleepSoul Comfort 800 Pocket Mattress

 

For king-size sleepers on a budget, this mattress punches well above its weight. It’s supportive, breathable, and rolled for easy setup.

 

Pros:

  • Pocket springs adapt to your body
  • Works well for back and side sleepers
  • 10-year warranty included

 

Potential cons:

  • Edge support could be better
  • Medium-firm feel might not suit very light sleepers

Best Memory Foam Mattress Under £300

SleepSoul Balance 800 Pocket Memory Mattress

 

Looking for memory foam on a budget? This hybrid offers excellent support and comfort thanks to its blend of pocket springs and a memory foam top.

 

Pros:

  • Contours to your body and relieves pressure points
  • Vacuum-packed for convenience
  • 10-year guarantee

 

Potential cons:

  • Some edge sinking when sitting
  • Side sleepers wanting plush softness may find it a bit firm

How to Choose a Mattress Under £300

You don’t need to spend a fortune to get a decent night’s sleep, but you do need to be picky.

 

What to look for:

  • Pocket sprung mattresses or memory foam mattresses with lots of positive reviews
  • Brands with a good reputation (Silentnight, SleepSoul etc.)
  • A solid warranty and return policy (5/10-year warranty is best)
  • Real user reviews, not just star ratings

 

Go and try mattresses in shops, note the model and specs, then compare online. Often you’ll find the same build for less.

 

Top tips from Forums

 

These have been collected from the likes of Reddit, MumsNet and Money Saving Expert.

 

  • “Whatever you go with, buy extra firm. Will last longer than anything soft.”
  • “The mattress I’ve been most happy with is an old-style pocket sprung mattress.”
  • “I’ve got a pocket spring one with a memory foam top. It’s been fantastic for years.”

Amazon & eBay Mattress Advice

Should I buy a mattress on Amazon?

 

Yes. Many of the best budget mattresses are on Amazon. Here’s why:

  • Easy returns and great customer service
  • Many come with Prime delivery
  • You can often pick a delivery date
  • Brands like Silentnight offer solid quality at low prices

 

Be careful if you’re considering an unknown brand. Always read the verified buyer comments and watch out for fake reviews or misleading listings.

 

Should I buy a mattress on eBay?

 

Maybe, but with caution. Only consider:

  • New mattresses (avoid used or refurbished)
  • Sellers with high ratings or well-known brands

 

Buying a used or refurbished mattress on eBay comes with 3 potential issues:

  • Hygiene: Used mattresses can harbour dust mites, allergens, and even bed bugs
  • Warranty: Used mattresses typically don’t come with a warranty or solid return policy
  • Service: likely to be poorer than buying from Amazon or a known mattress retailer

Consider an IKEA Mattress

IKEA doesn’t pay us to say this, but their mattresses offer great value for budget buyers.

  • You can test them out in-store
  • Usually a couple of firmness choices
  • 365 night sleep trial where you can exchange it if it isn’t suitable

 

And they’re highly rated amongst online forums:

  • “Ikea are pretty good for the price.”
  • “I’ve bought two Ikea mattresses in the last 5 years and I like them”
  • “You can test them in store, but if it’s not for you after you’ve bought it, IKEA will let you change your mind and swap it for another one”

 

Best IKEA mattress under £300

Vesteroy Pocket Sprung Mattress

 

Pros:

  • Good motion isolation
  • Convenient delivery & setup
  • Breathable and hypoallergenic
  • Affordable hybrid option
  • Solid 10-year guarantee
  • Suitable for teens, side or back sleepers on a budget

 

Potential drawbacks

  • Some users report excessive softening
  • Weak edge support
  • Reports of sagging and uneven wear within a year

 

Better alternative: SleepSoul Comfort 800 Pocket Mattress.
https://www.mattressnextday.co.uk/sleepsoul-comfort-800-pocket-mattress

 

  • Better pressure relief due to foam top layer
  • Better ratings and consistent reviews
  • Cleaner, hypoallergenic, breathable cover
  • Suitable for all sleep positions

Mattress Topper Alternatives

If your under-£300 mattress feels a bit basic, a topper can make a huge difference.

 

This is a popular option amongst Reddit, MumsNet and Money Saving Expert users:

  • “If you go for a basic one, you can then add your own topper of your choice”
  • “IKEA sprung mattress (crap on its own, firm) + panda London bamboo mattress topper (amazing)”

 

Here are 3 budget-friendly options from Amazon:

  1. Silentnight Sleep Topper – Budget Option
  2. Silentnight Anti-Allergy Topper
  3. Mightysoft Non-Branded Budget Topper 

How to make your under £300 mattress last longer

  • Rotate or flip regularly (check the label instructions)
  • Use a topper for extra comfort and protection
  • Use a waterproof mattress protector
  • Spot clean when needed
  • Don’t jump on it or bend it too often