M&S Collection 1500 Pocket Spring Extra Firm Mattress

M&S Collection 1500 Pocket Spring Extra Firm Mattress

£599.00
sleeping cat
24p per sleep based on average mattress lifespan
Single
Small Double
Double
King Size
Super King
With Divan Bed Set
With Ottoman Bed Set
*We work with retailers to secure the best deals, outgoing links are monetised

Pros & Cons

Here we collect tests, guides and product reviews so that you can create a picture of what others think about the product. This analysis and review is based on my experience and a decade of industry insight.

  • Individually pocketed springs for tailored support
  • Extra firm support ideal for back sufferers
  • Edge-to-edge support for consistent comfort
  • 10-year guarantee for peace of mind
  • Made in the UK with high-quality materials
  • Extra firm feel may not suit everyone
  • Heavy and requires regular flipping
  • Higher price point compared to other options

Read why our sleep experts loved it ›

Who is it best for? powered by SnoozeScore

In our experience, the materials and construction that go into this product can make it suitable for the following people.

Back sleeping and stomach sleeper icon
For back and stomach sleepers
Additional support helps these positions
Reduced partner disturbance icon
Reduced partner disturbance
Pocket springs work independently to one another.
Roll together prevention
Roll together prevention
Independent springs help prevent roll together.
Acid reflux icon
Helps with acid reflux
When paired with a compatible adjustable bed.
Toss and turn icon
Good for those who toss and turn
Materials like memory foam can restrict movement.
snooze score logo Still not sure if the M&S Collection 1500 Pocket Spring Extra Firm Mattress is suitable for you? Answer 4 simple questions with our quiz Take Suitability Quiz

Why our sleep experts loved it

Note: This review is based on the mattress’s specs and design - we didn’t get to lie on it in a showroom. Think of this as a lab coat analysis rather than a sleepy-time field test. M&S tells us the 1500 Pocket Spring Extra Firm Mattress is built with 1,500 individual pocket springs that “react to your body’s contours,” plus an edge-to-edge spring layout for uniform support. A thin foam layer adds a touch of comfort, but with an extra-firm rating, don’t expect a plush hug - it’s more of a controlled embrace. The cover has anti-odour, antibacterial and anti-allergy finishes, and there are vents and sturdy side-stitching for breathability and durability. M&S backs the build with a 10-year guarantee. In short, this is engineered as an orthopaedic workhorse, not a fluffy featherbed.

Comfort and Feel

If you crave a sinking, pillow-top experience, this isn’t it. The extra-firm label is literal and it feels very firm. The foam layer provides “extra comfort”, but it’s still a firm bed at heart. One owner quipped it’s “the firmest of all” mattresses they’ve tried and recommended using a topper for softness. In practical terms, your hips and shoulders won’t sink deeply into foam. That means less contouring hug and more of a stable, uniform surface. Firm fans (especially those who like sleeping on their backs or stomachs) will find it nicely supportive. But if your comfort ideal is a cloud-like sink, you may want to plan for a plush topper or to explore a different firmness.

Support and Spinal Alignment

Extra-firm mattresses are designed to keep your spine straight rather than curved, which helps maintain alignment (especially on your back or stomach). M&S even notes this has an “extra-firm feel” meant for “back support” and tension relief. In fact, studies often recommend a medium-firm surface for optimal spine health, since medium firmness lets some curve while still offering support. Going firmer, as this mattress does, effectively locks your spine straighter. For many sleepers—particularly heavier or back-sleepers—this can feel solid and stabilizing. Just remember that if you’re lightweight or have a very curved body shape, you might notice more pressure under your hips or shoulders. In general, expect a very stable platform that resists sagging, keeping your back flat and supported throughout the night.

Sleep Position Suitability

  • Side sleepers: Likely to feel the firmness. Firm mattresses often put more pressure on hips and shoulders for side sleepers. Experts note side sleepers with shoulder pressure usually need soft-to-medium cushioning to ease pressure. On this extra-firm model, side sleepers (especially lighter ones) may find those joints feel a bit pinched. A good topper could help absorb pressure, or you might prefer a softer mattress style.
  • Back sleepers: This is where extra-firm shines. Your lower back will get strong support, and with the spine aligned, it can relieve tension. One reviewer agreed: it’s “perfect for back sufferers”, meaning people with back pain often like the firm support. If you sleep on your back, expect a very flat spinal posture that many health pros endorse.
  • Stomach sleepers: Also a good match. Stomach (front) sleepers generally need a firm surface to prevent hip sinkage and keep the torso level. The pocket springs and foam here will keep your hips and shoulders elevated in line with your legs, which prevents the notorious lumbar arch. So if you find softer beds make your hips too low (straining your back), this extra-firm mattress should address that problem.

Suitability for Different Body Types

Lightweight sleepers: If you weigh less than average (say under 60kg), this mattress might feel very firm - almost like lying on a smooth hardwood board. You might barely compress the springs, so there’s minimal “give.” Some light sleepers report needing an extra layer (like a plush topper) to soften the feel. In that sense, petite sleepers should approach with caution if they want cushioning.

Average-weight sleepers: People around the middle range (60-90kg) will compress the springs a bit more and might find it just firm enough. Your body weight creates a modest sink, so you get support without extreme hardness. This mattress will feel solid and supportive, though you might still notice a distinct “edge” where the spring coil resists pressure.

Heavier sleepers: Larger individuals (90kg+) may actually find this mattress ideal. Your weight will compress the springs more deeply, creating a slightly softer feel (perhaps more like a 7/10 than a 9/10) while still keeping strong support. Extra firm beds often suit heavy sleepers because they rarely bottom out the springs. Also, the robust spring count and heavy construction (up to 57kg for a king size) handle weight well. Heavy sleepers should get a durable, supportive surface from this mattress.

Motion Isolation

Because each spring is individually pocketed, movements stay relatively localized. M&S claims the springs “work independently” to reduce motion transfer. In plain terms, your partner can toss and turn without the whole mattress rippling like a waterbed. It’s not as dead-silent as thick memory foam (which virtually eliminates motion transfer), but it’s better than an old continuous coil or hybrid without isolating layers. There is also that foam layer adding a bit of damping. Many owners have noted that when their partner shifts, it’s not too disruptive—helpful if one of you wakes up easily.

Temperature Regulation and Breathability

Springs inherently breathe, and this mattress has extra features to stay cool. Notably, the Ortho version mentions eight air vents around the sides to increase airflow. These vents let warm air escape from inside the mattress. The cover (likely a cotton-blend treated with odour and allergy protection) feels fairly breathable, and the fibrous fillings inside wick away moisture. There’s no fancy gel or phase-change layer here, but the nature of an open pocket-coil system means heat doesn’t get trapped. In practice, this mattress should sleep cooler than an all-foam model. If you’re a warm sleeper, you’ll still want breathable sheets, but at least the design isn’t working against you. Users have mentioned “great for back” and didn’t complain of it feeling hot, suggesting temperature isn’t a major issue.

Materials and Construction

The core is the name of the game and made up from 1,500 pocket springs (for the King size; fewer springs in smaller sizes, but always a high count per square meter). Each spring is wrapped in its own fabric pocket, so it moves on its own. Above the springs lies a comfort foam layer - M&S doesn’t specify if this is memory foam or polyfoam, but at extra firm, it’s probably a high-resilience foam for slight cushioning without sink. The cover is quilted and treated to be antibacterial, anti-odour, and anti-allergy, which can benefit sensitive sleepers (though “anti-allergy” is usually a surface treatment, not a guarantee). Around the edges you get three rows of reinforced side-stitching, which helps maintain shape and prevent internal shifting. There are four handy handles (two per side) to help you lift or turn the mattress. Weights range from about 32kg for a small single up to 69kg for a 6'0" super king, so it’s solidly built. M&S even notes it’s made in the UK, reflecting local manufacturing standards. Overall, it’s a no-nonsense construction focused on support and durability.

Durability and Long-Term Use

Durability looks promising here. Metal pocket springs tend to hold their shape for many years (longer than cheaper foam layers alone). The triple side-stitching and robust cover imply it’s built to last. M&S explicitly recommends flipping and rotating this mattress regularly - weekly for the first 3 months, then quarterly - which will also lengthen its life. The big hint is the 10-year guarantee: a manufacturer won’t do that if they expected it to sag in 5 years. In use, expect the springs to remain relatively springy (they’re steel, after all) and the firmness to stay consistent if you follow care instructions. Reviews (where available) show many people still calling it “excellent” on comfort and quality after months of use. In short, this mattress seems engineered to stay firm and supportive for the long haul.

Ease of Setup and Use

This mattress is a setup breeze because no assembly is required. It comes fully built, wrapped in packaging, and M&S’s delivery crew will place it in your room of choice and remove the packing. No worrying about wrong screws or confusing manuals. The only slight challenge is its weight with a king size coming in at around 57kg, which is quite heavy if you try to move it yourself. Thankfully, those four handles on the sides are sturdy and designed for exactly this purpose. Once it’s in place, you just lay on your sheets. Flip/rotate instructions (every few months) are straightforward, so upkeep is low-hassle. In daily use, it’s just a flat surface - no zippers, no electric adjustments - so nothing can really “go wrong.” Users often praise the delivery and placement experience, saying it arrived as promised and the team positioned it exactly where they wanted.

Value for Money

For a high-quality pocket-spring bed with 1,500 coils and a 10-year warranty, the price (£599-£799 for king size) is quite reasonable. You’re not getting a cheap no-name mattress - this is a branded M&S product with premium features. Customers seem to agree; one reviewer gave it a 5/5 for value, and overall ratings of quality and value are excellent. Considering it includes delivery and setup, and comparing to similar high-end ortho mattresses, it stands up well. In the context of mattress pricing, it occupies the mid-to-upper range, which matches its solid build. The extra-firmness is somewhat niche (so it’s not for everyone), but for what it is, the price reflects its durable construction and support technology. In short if you’re paying for genuine orthopaedic-level firmness and a decade of warranty - a decent deal if that’s what you want.

Who Is This Mattress Ideal (- or Not Ideal -) For?

In summary, this mattress is a great pick if you love very firm support or need it for medical reasons. It’s ideal for back and stomach sleepers who want spine-alignment, heavier sleepers who need sturdy coils, or anyone with lower-back pain who finds softer beds too lumpy. Allergy-prone sleepers might also appreciate the treated cover. However, it’s not ideal for someone who sleeps on their side and craves plush cushioning under hips and shoulders. Petite or lighter-weight people will likely find it too hard without adding a topper. If you sleep hot but like springs, you’ll do fine, but this won’t magically cool you - it’s just less insulating than foam. Finally, if you’re not fond of the “board-like” feel, consider one of M&S’s medium or pillow-top models instead. But if your ideal mattress is firm as a board but still with a little give from 1,500 springs, this M&S Extra Firm is right in your sleep lane.

Summary: The M&S 1500 Pocket Spring Extra Firm Mattress is built to last and loves heavy-duty back support. It’s excellent for front/back sleepers and heavier people who need an orthopaedic feel. Side sleepers or anyone seeking softness should probably look elsewhere (or use a topper). In the firm-mattress world, this one stands out for its quality and warranty - just don’t expect a cloud hug unless you add your own.

Why you can trust WantMattress We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the M&S Collection 1500 Pocket Spring Extra Firm Mattress may feel.

weight description image

Price History

The price graph displays the lowest price over time excluding shipping.

Alternative products with similar specifications

We have handpicked some alternate options that should perform equally well that are worthy of consideration if you are interested in the M&S Collection 1500 Pocket Spring Extra Firm Mattress.

Quantitative Measurements KPI question mark
Of The M&S Collection 1500 Pocket Spring Extra Firm Mattress
Here's how the product performs based on the materials and composition when compared to other products of similar price point. These measurements are produced using a combination of specification-heavy algorithmic data points and our own hands on experience.

Quantitative Measurements KPI question mark

Here's how the product performs based on the materials and composition when compared to other products of similar price point. These measurements are produced using a combination of specification-heavy algorithmic data points and our own hands on experience.

Suitability

*Assuming average weight, suitability will vary dependant on body type, use the quiz above for a more tailored guide.
  • Back Sleepers
    ★★★★★
    ★★★★★
  • The amount of support offered from a mattress will vary depending on the firmness of the tension and the type of support layer used. Based on a person of average build.
  • Side Sleepers
    ★★★★★
    ★★★★★
  • If you sleep on your side you typically need a supportive tension that is not too firm, nor too soft. This is because your hips and shoulders need adequate sinkage.
  • Stomach Sleepers
    ★★★★★
    ★★★★★
  • Stomach sleepers need a reasonable amount of tension in the base support layer to adequately offer body contouring and help prevent aches and pains. Results will vary based on your build.

Performance

  • Breathability
    ★★★★★
    ★★★★★
  • Mattresses that feature breathable materials help promote airflow and keep you cool making for a more hygienic night's sleep.
  • Turning on mattress
    ★★★★★
    ★★★★★
  • Certain materials like memory foam can make it difficult to move about on the mattress while you toss and turn. Same too for pillow tops which can create a cloud like sensation which can make manoeuvrability challenging.
  • Stability
    ★★★★★
    ★★★★★
  • Depending on the type of support layer in place can have an impact on stability, edge to edge support and roll together prevention. Pocket springs of a firmer tension will have better stability than open coil soft tension, for example.

Odour

  • Initial Odour
    ★★★★★
    ★★★★★
  • Materials in mattresses, particularly memory foam and rolled bed-in-a-box mattresses can have an initial odour, this is typically short term and reduces considerably within 24 hours.
  • Long Standing Odour
    ★★★★★
    ★★★★★
  • Certain materials inside different mattresses can produce a small odour. Typically this is short term rather than long standing but there are minor exceptions.

Questions and Answers About The M&S Collection 1500 Pocket Spring Extra Firm Mattress

Prospective customers had the following questions about the product

Image of the post author
Verified Buyer
Does the mattress require flipping?

Answer: Yes, it is recommended to flip and rotate the mattress once a week for the first three months, and then every three months thereafter to ensure longevity and even wear.
Image of the post author
Verified Buyer
Is this mattress suitable for someone with back pain?

Answer: Yes, the extra firm support of this mattress is ideal for individuals with back pain as it provides the necessary support to maintain proper spinal alignment.
Image of the post author
Timmy Burb
Can I use this mattress on an adjustable bed frame?

Answer: While the mattress is designed for standard bed frames, it may not be suitable for adjustable bed frames due to its extra firm structure and weight.
Image of the post author
M777
Is there a trial period for this mattress?

Answer: The product does not mention a specific trial period, but it does come with a 10-year guarantee covering manufacturing defects.
Image of the post author
Verified Buyer
What is the weight of the king size mattress?

Answer: The king size mattress weighs approximately 57 kg, so it may require assistance when moving or flipping.
Load more questions
Ask question
Of The M&S Collection 1500 Pocket Spring Extra Firm Mattress
Brand: Marks and Spencer
Retailer: Marks and Spencer
Delivery Time: Good
Guarantee: Excellent

Calendar Icon Radar Analysis Radar Analysis Question Mark

Radar Analysis looks at the product, brand and retailer against base norms established within the industry and determines where the product sits by way of established performance metrics.

Product Relevant Videos

Hand picked video that relates to the specifications of The M&S Collection 1500 Pocket Spring Extra Firm Mattress

Firm vs Soft Mattress
Firm vs Soft Mattress
By BedStar
What are Pocket Springs?
What are Pocket Springs?
By BedStar

Customers Also Viewed View More From Marks and Spencer

Below are some other products from this retailer that are being viewed.

How we reviewed this product

At WantMattress, we adhere to stringent sourcing standards, drawing from peer-reviewed research, scholarly institutions, medical associations, and firsthand accounts and experience. We refrain from using tertiary sources. To understand how we maintain the accuracy and up-to-date nature of our content, please read further about how we test.

Latest Advice and Guides Your Questions Answered

Below are some of our best guides for learning more about the importance of sleep.

Everything You Need To Know About Mattress Fillings
Soft and Squishy Memory Foam
Simple Mattress Buying Guide
Decorative award symbol in corner
Mobile award badge

Introducing our WantMattress Better-Sleep Award

Looking for a new mattress? Our experts have tried and tested the best UK mattresses for back, side, and front sleepers from Eve, Emma, Origin, and more top brands.

Quantitative measurements icon
New Quantitative Measurements
Head-to-head comparison icon
Radar Analysis Head to Head
Suitable for different sleeper types icon
Who This Mattress Will Suit
Sleep experts' approval icon
Why our sleep experts loved it
VS Product Comparison
Product Added