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Features you'll love

Support System

Pocket Springs

Individually pocketed springs work to give you support exactly where you need it.

Comfort Fillings

Cool Gel Memory Foam

Infused with gel microbeads to regulate temperature, while also improving breathability.

Firmness

Medium Firm

Good for people who change sleeping position.

Description

With a plush, cushioning pillow top, and orthopaedic, highly supportive pocket springs, the Premium Memory Hybrid Mattress is ready to offer you the proper night's sleep you've been dreaming of.

Orthopaedic pocket springs target key areas of the body

High tensile steel pocket springs are housed in individual fabric pockets, allowing them to move independently - a bit like piano keys - to adapt to your changes in weight distribution (your movement) throughout the night. This adaptability allows them to target intense support to key areas of your body, especially your shoulders and hips, which in turn helps to keep your spine aligned to reduce back aches and pains.

A cooler, fresher night's sleep free from overheating

To help keep you at the optimal sleeping temperature, a generous layer of Cool Gel Memory Foam actively draws heat away from the body for a fresher, cooler sleeping experience. This memory foam also gently moulds to your unique body shape, offering personalised pressure relief that helps to relieve tension at every point of contact. A plush pillow top layer acts as a built-in mattress topper, plumped with Comfort Foam layers which provide even more cushioning pressure relief.

An undisturbed night's sleep and a fuller sleep surface

Reinforced edges thanks to an outer layer of firmer pocket springs allow you to enjoy the full surface of the mattress without worrying about side-sagging. Maintaining the structure of the mattress and enhancing its durability, this 'no roll together' technology also gives you and your partner personalised sleeping zones, so you don't end up rolling towards the middle of the bed by accident.

1278547-5056370883540

Features

800 Pocket Springs

Pocket springs are springs mounted in their own separate fabric pockets, meaning they work completely independently of one another and can provide your body with better pressure relieving support.

Cool Gel Memory Foam

Cool Gel Memory Foam enhances pressure relief and support, while also improving comfort for a better nights sleep. Cool Gel Memory Foam has the added benefit of being better at regulating body temperature than standard memory foam, so you won't feel too hot in warmer months.

32cm Depth

This mattress is approximately 32cm deep.

Knitted Cover

This luxurious soft knitted cover is breathable, which helps to keep the sleeper at an even temperature all night long.

Orthopaedic Support

Designed to offer a firmer sleep surface, providing targeted support for your back and joints.

Reinforced Edges

The mattress has reinforced edges, so that the full sleep surface can be used. This means more sleeping space - which is usually lost in conventional, less edge-stable mattresses.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

Vacuum Packed & Rolled

Rolled mattresses have the advantage of being easy to transport, especially to upstairs bedrooms. When unrolled, they expand fully over time, usually being comfortable enough to sleep on after 48 hours.

Pillow Top

Pillow top mattresses have the benefit of an additional pillow layer of plush fillings on the top of the mattress, which provides extra luxurious comfort.

No Roll Together

Individual personal sleeping zones mean that you won't be disturbed if your partner rolls or moves, as you won't feel their motion. There's also no tendency to roll towards the middle of the mattress.

Pressure Relieving

This type of mattress gives maximum pressure relief, allowing your body weight to spread across it evenly. This ultimately means less tossing and turning throughout the night and a more relaxing and restful sleep.

Turning Handles

Flag-stitched handles are attached to the sides of the mattress to assist in turning or rotating.

Hypoallergenic

Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

Vegan Friendly

This product is made from materials that are 100% free from animal by-products.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

Benefits

Individually pocketed springs target orthopaedic support to key areas of your body
A Cool Gel Memory Foam layer actively cools and cushions your body
Comfort Foam layers contour your body to provide enhanced support and comfort
Reinforced edges with two outer rows of firmer springs maintain the mattress structure
No roll together technology provides you and your partner personalised sleeping zones
Vacuum-packed, rolled, and boxed for your convenience

Dimensions

Product dimensions and load limits
Size	A	B	C	D	E	Max. Load	Max. Mattress Height	No. of Boxes	Net Weight
Single	32cm	190cm	90cm	N/A	N/A	N/A	N/A	N/A	26kg
Small Double	32cm	190cm	120cm	N/A	N/A	N/A	N/A	N/A	33kg
Double	32cm	190cm	135cm	N/A	N/A	N/A	N/A	N/A	36kg
King Size	32cm	200cm	150cm	N/A	N/A	N/A	N/A	N/A	40kg
Super King	32cm	200cm	180cm	N/A	N/A	N/A	N/A	N/A	48kg

Sizes may vary slightly from their stated dimensions due to manufacturing tolerances, please allow +/- 20mm (1in)
Not sure if this will fit? Read our Home Measuring Guide for step-by-step advice.

Best Seller

Lowest Price Promise!

Shop with confidence. We monitor our competitors' price every 24 hours to ensure you're always getting the best deal. As the 2025–2026 'Online Bed Retailer of the Year', we pair unbeatable value with award-winning next-day delivery.

Coolflex® Premium Memory Hybrid Mattress

4.9 out of 5

5 Star (99)

4 Star (10)

3 Star (0)

2 Star (0)

1 Star (1)

Experience personalised support and cool comfort for a restful night's sleep.

800 Pocket Springs

Cool Gel Memory Foam

32cm Depth

Firmness: Medium Firm

£279

RRP £339

Save £60

Hurry, this offer ends in 0 days 0hrs 0mins

from £279

Size

Single 3' x 6'3"

£279 RRP £339

3-4 Weeks

Small Double 4' x 6'3"

£329 RRP £409

In stock

Double 4'6" x 6'3"

£329 RRP £409

In stock

King Size 5' x 6'6"

£379 RRP £449

In stock

Super King 6' x 6'6"

£429 RRP £519

In stock

FREE Delivery within 3-4 Weeks Estimated delivery from 5th July

FREE delivery Tomorrow, 15th June
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Description & Features

With a plush, cushioning pillow top, and orthopaedic, highly supportive pocket springs, the Premium Memory Hybrid Mattress is ready to offer you the proper night's sleep you've been dreaming of.

Orthopaedic pocket springs target key areas of the body

A cooler, fresher night's sleep free from overheating

An undisturbed night's sleep and a fuller sleep surface

800 Pocket Springs

Pocket springs are springs mounted in their own separate fabric pockets, meaning they work completely independently of one another and can provide your body with better pressure relieving support.

Cool Gel Memory Foam

32cm Depth

This mattress is approximately 32cm deep.

Knitted Cover

This luxurious soft knitted cover is breathable, which helps to keep the sleeper at an even temperature all night long.

Orthopaedic Support

Designed to offer a firmer sleep surface, providing targeted support for your back and joints.

Reinforced Edges

The mattress has reinforced edges, so that the full sleep surface can be used. This means more sleeping space - which is usually lost in conventional, less edge-stable mattresses.

No Need To Turn

A single-sided mattress which does not need to be turned/flipped. One-sided mattresses should, however, be rotated head to toe regularly.

Vacuum Packed & Rolled

Pillow Top

Pillow top mattresses have the benefit of an additional pillow layer of plush fillings on the top of the mattress, which provides extra luxurious comfort.

No Roll Together

Pressure Relieving

Turning Handles

Flag-stitched handles are attached to the sides of the mattress to assist in turning or rotating.

Hypoallergenic

Being hypoallergenic, this is the perfect item for allergy sufferers - or anyone looking for a healthy night's sleep.

Vegan Friendly

This product is made from materials that are 100% free from animal by-products.

Fire Resistant - Low Hazard

This product conforms to the BS7177: 2008 standard for domestic use (low hazard) - ideal for use at home.

Individually pocketed springs target orthopaedic support to key areas of your body
A Cool Gel Memory Foam layer actively cools and cushions your body
Comfort Foam layers contour your body to provide enhanced support and comfort
Reinforced edges with two outer rows of firmer springs maintain the mattress structure
No roll together technology provides you and your partner personalised sleeping zones
Vacuum-packed, rolled, and boxed for your convenience

1278547-5056370883540

Dimensions

Coolflex® 5 Year Guarantee

Coolflex® 5 Year Guarantee

Coolflex® mattresses are made with the most meticulous of care, but in the very unlikely event that something should go wrong as a result of faulty material or craftsmanship, you're covered by a generous 5 year guarantee.

Download warranty/guarantee information

100 Night Sleep Trial

Finding the perfect mattress shouldn't be stressful. That's why we offer a generous 100 night sleep trial. Snuggle in and test it out for at least 50 nights. If it's not your perfect match we’ll offer you an exchange for a mattress that you love even more.

Delivery & Returns

Delivering a better night’s sleep

We are proud to provide our award-winning Free Next Day Delivery service to almost everywhere across mainland UK, sending a proper night’s sleep out far and wide.

Hassle-free and convenient, you can choose a date and time that suits you if you prefer, and get us to deliver straight to your room of choice!

For some addresses, a small fee will be charged to help us get you your best night’s rest as quickly as possible. To see if this applies to you, or if we’d be unable to deliver to you, just check our Postcode Checker.

Returns made simple

Sleep is personal, so we understand that sometimes you may want to return an item you’ve purchased from us for an exchange or refund.

To make things go as smoothly as possible if you do decide to return, make sure that you check your item(s) when they arrive before signing for delivery.

In the unlikely event of a problem, just give our friendly, award-winning Customer Service team a call, but do note that if you want to return your item to us, you will be responsible for arranging it and for the cost. For more information, head to our Returns page.

Recycling & Sustainability

Old Mattress Removal

For just £39, our fast and friendly team will collect your old mattress at the exact same time we deliver your new one. No waiting, no heavy lifting, and no clutter. 100% of your old mattress is carefully recycled and kept out of landfill. Simply select 'Old Mattress Removal' at checkout.

Our Sustainability Efforts

We’re proud to be partnered with Ecologi, the UK’s leading climate platform, to help us plant trees and fund environmental projects across the globe, protecting the world’s rainforests and helping those in need.

Our #SustainableSnooze campaign also highlights our journey to becoming a Net Zero company, keeping as many old mattresses out of landfill, and making positive steps in our internal processes to become as green as possible.

Read more about why this is important to us and the milestones we’ve achieved on our Sustainability page.

Frequently paired with

More Medium Firm Mattresses

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More from Coolflex®

More to explore

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Mattress recycling

Planet-friendly disposals

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Coolflex® Premium Memory Hybrid Mattress

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Coolflex® Cool Gel Memory Foam Mattress Topper

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*Delivery charges may apply for some areas. Please see our delivery page for more information.
1. Order by 6pm for next day delivery between Monday-Friday, 12pm on Saturday and 3pm on Sunday. The 'Order by' time may be subject to change dependant on our delivery partners.

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MattressNextDay, 116 Joseph Wilson Industrial Estate, Whitstable, Kent, CT5 3SN

We value your privacy

Features you'll love

Orthopaedic pocket springs target key areas of the body

A cooler, fresher night's sleep free from overheating

An undisturbed night's sleep and a fuller sleep surface

Coolflex® Premium Memory Hybrid Mattress

Orthopaedic pocket springs target key areas of the body

A cooler, fresher night's sleep free from overheating

An undisturbed night's sleep and a fuller sleep surface

Delivering a better night’s sleep

Returns made simple

Old Mattress Removal

Our Sustainability Efforts

Rated Excellent

Customer Review Summary

Reviews with images

Frequently paired with

More Medium Firm Mattresses

More with Pocket Springs

More from Coolflex®

You might also like

More to explore

Your order helps us plant trees

Free, fast delivery

Mattress recycling

0% Interest finance

Coolflex® Premium Memory Hybrid Mattress

£

Pair it with

Very very comfortable. Exception…