Sleep News

Horizon Discovery Pocket Memory is a Which? Best Buy!

11 Dec 20205 min read

Here at Mattress Online, we’re proud to say that the double size of the Horizon Discovery 1500 Pocket Memory Mattress is a Which? Best Buy mattress 2020. The Horizon Discovery was tested against a variety of competitors and was chosen for the Best Buy Award!

This is an excellent Best Buy hybrid mattress that combines good spinal support with great stability. It’s highly durable which means you should get a decent night’s sleep on it for many years.

Horizon Discovery 1500 Pocket Memory Mattress
Horizon Discovery 1500 Pocket Memory: a Which? Best Buy!

The Discovery scored 76% in Which? independent tests!

The Horizon Discovery double mattress scored a fantastic 76% during the Which? independent tests. Which? found that the Discovery was a great all-rounder.

Overall, Which? reviewers found that the Horizon Discovery has good stability and spinal support and will give you a good night’s sleep for years to come. Read on to find out how our mattress scored 76% in Which?’s testing.

This is a top-performing Best Buy mattress that has done well across the board


Top 5 reasons why the Discovery is a Which? Best Buy

For each category, mattresses are given a score based on how well they performed. These are a few of the amazing scores that Which? gave the Discovery:

  1. Body support overall - 4 / 5 stars
  2. Stability - 5 / 5 stars
  3. Overall durability - 5 / 5 stars
  4. Minimal smell - 5 / 5 stars

1. Great support

Which? found that the Horizon Discovery double mattress had good levels of spinal support. Featuring 1500 individual pocket springs, you’ll be getting personalised support while you sleep. The pocket springs react to your unique shape - so you can sleep soundly knowing that you’re getting support exactly where you need it most.

2. Excellent stability

The Horizon Discovery is very stable thanks to the high-density foam base, pocket sprung support and reinforced mattress edge. This means you'll enjoy a peaceful sleep - with no motion transfer between you and your partner.

You’re unlikely to incur the wrath of your sleeping partner when you shuffle about


3. Highly durable

Which? remarked on how durable the Horizon Discovery is. This means that you’ll be able to enjoy all the support and comfort the Discovery provides for years to come!

There will be little deterioration over time as this is a highly durable mattress that maintains its structural integrity

Horizon Discovery 1500 Pocket Memory Mattress on a bed
The Which? Best Buy Horizon Discovery is a stunning addition to your bedroom

4. Extra breathability

Which? tested the breathability of the Discovery by seeing how much the mattress gets dampened by sweat. Which? found that the material is very breathable and unlikely to get damp.

5. Great for all sleepers

Which? tested a variety of sleeping positions to see which sleepers this mattress is best for. Which? suggest that the Horizon Discovery is best for side or front sleepers.

It’s clear that the Horizon Discovery combines good levels of support, stability and breathability so all sleepers can enjoy a fantastic night’s sleep.

Who are Which?

Which? is the biggest independent and impartial consumer organisation in the UK. They review products to promote product safety and quality. They rigorously test many different products and those that rank highest receive a Which? Best Buy award.

Which? mattress reviews are well-renowned. Why not browse our entire range of Which? endorsed products?

How do Which? test mattresses?

Which? really puts mattresses to the test so you can see which one can help you get an amazing night’s sleep.


Which? measures the shape of each person’s spine at 36 points when they're standing and measures their spine again when they’re lying down to see the difference. This shows how supportive the mattress is.


Using cutting-edge mattress testing technology, Which? can simulate the deterioration of mattresses over many years. By rolling a barrel over the mattresses over a thousand times, they can analyse the mattress durability.


Which? test to see how damp the mattress gets if you sweat in your sleep - more breathable mattresses won’t get as damp as others.


To measure stability, Which? analyse how noticeable it is when your partner moves in their sleep. Very stable mattresses absorb movement so your partner’s movements are less likely to disturb your sleep.

Horizon Discovery 1500 Pocket Memory Mattress
Which? rates the Horizon Discovery a fantastic 76%!

How does it compare?

See how this mattress compares to a variety of competitors.

Horizon Discovery 1500 MemoryWhich? Best Buy - Oct 20201500 pocket springs7.5cm memory foam
Luna Memory 1000 Pocket HybridN/A1000 pocket springs2cm memory foam
SleepSoul Bliss 800 Memory Pillow TopN/A800 pocket springs2cm memory foam
Sleepeezee Jessica 1800 Pocket Gel MattressWhich? Best Buy - June 20201800 pocket springs3cm memory foam

See what our customers think

It’s not just Which? that loves this mattress - our customers do, too! From enjoying the comfort of a big hug, to loving the sturdy support, our customers rave about the Horizon Discovery. Read what they have to say!

Getting into bed at night, feels like getting a great big hug


Mattress feels sturdy and very supportive


Mattress is excellent, nice quality and firmness is very comfortable... Overall very happy


Horizon Discovery 1500 Pocket Memory Mattress

A supportive and comfortable hybrid mattress - the double size is now a Which? Best Buy

Horizon Discovery 1500 Pocket Memory Mattress

Why it’s great!

  • Free Next Day Delivery
  • The double size was awarded a Which? Best Buy in October 2020
  • Featuring 1500 pocket springs for personalised support
  • A sumptuously deep memory foam layer for incredible comfort

This mattress is the full package. Rated medium for firmness and with 1500 pocket springs, you’ll be completely supported while you sleep. A luxurious layer of memory foam provides out-of-this-world comfort so you can get a cosy sleeping experience.

Topped off with a hypoallergenic soft knitted cover, you won’t have to worry about your allergies disturbing you in the night. With the Horizon Discovery, you’ll definitely be sleeping in style.

Now you know all about our fantastic Horizon Discovery 1500 Pocket Memory Mattress, why not take a look for yourself? You can browse our full range of Which? Best Buy mattresses too!