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Free next day delivery * Old mattress removal Two million happy customers 60-night sleep trial Rated Excellent - 4.8 out of 5
Silentnight Miracoil Sleep Mattress - image 1
96% of customers keep their mattress
Silentnight Miracoil Sleep Mattress - image 2 Silentnight Miracoil Sleep Mattress - image 3 Silentnight Miracoil Sleep Mattress - image 4 Silentnight Miracoil Sleep Mattress - image 5

Silentnight Miracoil Sleep Mattress

4.7/5
Roll-together is designed out by the spring system, keeping two sleepers settled on their own sides with a medium-firm feel.
iconMedium Firm
iconEco Comfort™
iconMiracoil™
icon21cm depth
  • Silentnight's unique miracoil system which prevents roll together
  • Hypoallergenic fillings and fabric
  • One sided for easy mattress care
Price Promise

Seen it cheaper somewhere else? We'll match it — that's our Price Promise.

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Our bed experts are on hand in-store and online to help you find the perfect mattress within your budget.

£345
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Available Upgrades
Current
Miracoil Sleep Mattress
Open coil allows motion transfer
Upgrade -£96.00
Cool Pocket
Pocket springs isolate movement
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Description
Specifications
Dimensions
1 Year Guarantee
Flexible Credit Options
The Verdict

What 415 sleepers really think

Rated 4.7/5 from 415 verified reviews
The Silentnight Miracoil Sleep mattress is frequently praised for its superb comfort and supportive nature, with many users indicating it provides a firm sleep experience that some found helpful for back issues. It offers good value for money and is described as high-quality and durable, often surpassing expectations in delivering restful sleep. However, several reviewers noted it is firmer than anticipated, suggesting that those seeking a softer feel may need to consider an additional mattress topper.

AI-generated from the text of customer reviews

Why This Mattress

Why buy the Silentnight Miracoil Sleep Mattress?

Every mattress is different. Scan for the ones that sound like you — if two or more fit, this is your mattress.

Best For
All Positions
Side one night, back the next?
A balanced feel that supports you whether you sleep on your side, back or front.
Helps with
Breathable
Wake up clammy?
Airy construction lets heat and moisture escape, so the sleep surface stays fresh through the night.
Helps with
Allergies
Wake up itchy or sneezy?
Hypoallergenic fillings and covers help keep dust mites and allergens at bay - ideal for allergy-prone sleepers.
Helps with
Pressure Relief
Achy hips or shoulders?
Cushioning comfort layers spread your weight evenly, easing pressure around hips and shoulders.
Thermal Control
All Season
Hot in July, cold in January?
A balanced build that doesn't run hot in summer or cold in winter, so it works all year round.
Helps with
Anti Bacterial
Freshness a priority?
A treated finish that stops bacteria building up, keeping things fresher and more hygienic for longer.
Helps with
Anti Microbial
Musty smells worry you?
Resists the microbes that cause mould and odours, helping the sleep surface stay clean and fresh.
How It Feels

How firm is it?

Medium Firm

Medium Firm is the level of support to the body, suitable for average to heavily weighted people. This is not a comfort rating.

About the Brand
Est. 1946★ 4.66 brand rating

Silentnight is the UK's most trusted sleep brand, renowned for quality craftsmanship and tailored support. With a range of mattresses featuring Miracoil and Mirapocket systems, they ensure optimal spinal alignment and comfort for every sleeping position, making a good night's sleep accessible to everyone.

View all Silentnight
Real Sleepers

What our customers say

4.7
Product Rated 4.7 Stars
415 reviews
Average Customer Ratings
Comfort4.7
Durability4.7
Quality4.8
Value for money4.8
Rating Snapshot
5 stars
303
4 stars
97
3 stars
8
2 stars
3
1 stars
4
Customer Photos
Customer Attachment
Excellent303
Great97
Average8
Poor3
Bad4
Doreen Amasike
Customer Rated This 5 Stars 5/5
11 Jul 2024
This is a very good mattress. I could feel the difference as soon as I lay on it. My body didn't sink into it like my old mattress. I like the fact that the mattress has metal rods at the edges to prevent it sagging. I missed this with my old mattress and it's not a feature you find with many mattresses these days. I also liked the fact that it wasn't rolled up for ease of delivery. My last mattress was rolled up and I think that rolling a mattress destroys it and causes it to always be a bit sunken in the middle. That's just my opinion though.
Comfort5
Durability5
Quality5
Value5
Verified By trustpilot verification
Terry Carpenter
Customer Rated This 5 Stars 5/5
31 Oct 2025
Excellent quality and good value for money, (while on an offer I paid just £263.00), and with it being made by the trusted name of Silentnight it's what is expected, they are not going to produce something that gives themselves a bad name or negative reviews intentionally are they. It's a very comfortable firm, but not too hard, mattress just as we wanted it to be, as for durability well that's too early say but having chosen Silentnight for many years I'm expecting good things.
Quality5
Comfort5
Value5
Verified By trustpilot verification
Amanda Grieves
Customer Rated This 5 Stars 5/5
26 Mar 2024
Silentnight miracoil mattress is the best mattress. My daughter had the same mattress which was 10 years old, so when it came to buying a new one, there was only one mattress she wanted. She is so pleased with it and has had perfect sleep since her new mattress arrived. I would recommend this mattress as always Silentnight quality is outstanding.
Comfort5
Durability5
Quality5
Value5
Verified By trustpilot verification
James Fleming
Customer Rated This 5 Stars 5/5
08 May 2026
I'd already bought the 3ft version of this mattress so I knew what to expect. Really comfortable and looks to be well made. Competitively priced, so a good purchase. As I said in a previous review, a tad firmer than I was expecting, the single was bought for the guest bed. I prefer a firm mattress and find it really comfortable.
Value5
Quality5
Comfort5
Verified By trustpilot verification
Donna Thompson
Customer Rated This 5 Stars 5/5
16 Nov 2024
Such a good price for this brand. Although it is medium/firm it goes beyond that and is very supportive with no sinking when you sit on the edge. This is a guest bed mattress and some might say it is too firm but there are plenty of toppers out there to add extra comfort but this really is worth the money.
Comfort5
Durability5
Quality5
Value5
Customer Attachment
Verified By trustpilot verification
Richard Light
Customer Rated This 5 Stars 5/5
27 Apr 2026
Our last mattress lasted 9 years, we was worried to go for the same again as manufacturers keep name the same but use cheaper materials normally. Not in this case! Mattress is very firm and regular turning there is no doubt it will last as long as the original.
Comfort5
Durability5
Quality5
Value5
Verified By trustpilot verification
Viewing 1 to 6 of 415
Our Promise

The Miracoil Sleep Mattress has

A 60-night sleep trial Sleep on it at home — love it, or exchange it between nights 30 and 60.
A 96% keep rate Not a survey — our own order data, updated weekly.
A 1 year guarantee See exactly what's covered, and for how long.
Price Match Promise Seen it cheaper somewhere else? We'll match it.
Good To Know

Frequently asked questions

What is the benefit of the Miracoil system in this mattress?
The Miracoil system is designed to prevent roll together, ensuring that movement on one side of the mattress does not disturb the other side. This feature is particularly useful for couples who share a bed.
Can allergy sufferers use this mattress safely?
Absolutely, the Miracoil Sleep mattress includes hypoallergenic fillings and fabric, which makes it an excellent option for individuals with allergies or sensitivities.
Can you tell me what the mattress cover is made from?
This mattress is enveloped in a damask cover that offers a gentle feel and promotes airflow, contributing to both comfort and freshness.
How is the comfort layer of the mattress constructed?
The comfort layer is micro quilted, which means the fabric and fillings are stitched together to create a patterned layer that provides added comfort.
Is it necessary to rotate this mattress?
This mattress does not need to be turned over as it is designed to be one-sided. However, to ensure even wear over time, it is advisable to rotate the mattress on a regular basis.
What kind of fillings are used in the mattress?
The mattress is filled with white fibre fillings made from 100% hypoallergenic polyester, which are both durable and suitable for those with hay fever.
How firm is the Miracoil Sleep mattress?
The mattress provides a firm tension due to its unique Miracoil design, which supports the body well while preventing roll together.
What construction type is used for the spring unit?
The mattress uses an open coil spring unit, which is constructed from a continuous length of wire, offering a firmer feel typical of budget-friendly options.
How does the Miracoil Sleep mattress support different sleeping positions?
The Miracoil Sleep mattress is designed with a medium-firm tension, making it suitable for a variety of sleeping positions including side, back, and front sleepers. This versatility ensures that regardless of your preferred sleeping style, you'll receive the necessary support to maintain healthy spine alignment. Additionally, the unique Miracoil spring system helps prevent roll-together, so couples can sleep comfortably without disturbing one another, even if they have differing sleeping preferences.
What is the fire safety rating of the mattress?
The Miracoil Sleep mattress has a Domestic Flammability Rated Source 2 for low hazard, suitable for general domestic use.
Better Together

Also paired with

Still Deciding?

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More To Explore

Where to next?

Silentnight Mattresses
Silentnight Medium Firm Mattresses
Silentnight Open Coil Mattresses

60-night sleep trial: exchanges only, not refunds. Activated by purchasing a mattress protector at the point of order. Request your exchange between nights 30 and 60 of the trial; a £50 exchange fee applies. Full terms.

Keep rate: the share of this product's delivered orders in the last 6 months that were kept rather than returned. Updated weekly, rounded down, capped at 99%, and only shown where we have at least 30 delivered orders.

Recommendation rate: the percentage of verified Trustpilot reviews for this product with a rating of 4 stars or more, rounded down.

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