Silentnight Plant Based Box Top 1800 Pocket Mattress

Name: Silentnight Plant Based Box Top 1800 Pocket Mattress
Brand: Silentnight
SKU: P2817
Price: 518.00 GBP
Availability: InStock
Rating: 3.5 (2 reviews)

Who is it best for?

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

What our reviewers found

Pros

With Mirapocket springs design, it provides excellent support for correct spinal alignment and pressure relief, improving your sleep quality.
Features a pillow top layer adding an extra touch of luxury and comfort, creating a cloud-like sleeping experience.
The hypoallergenic properties of the mattress, coupled with flax's cooling and anti-bacterial properties, promotes a cleaner and healthier sleep environment.
The incorporation of bamboo in its construction not only adds to its eco-friendliness but also enhances its softness and hypoallergenic value.
Substantial depth of 31cm and medium firmness level offers a perfect balance of comfort and support, particularly suitable for side sleepers and people of average weight.

Cons

Being medium tension, the mattress might not provide the desired support for heavier individuals who usually require a firmer mattress.
Those who sleep predominantly on their back may not find the desired level of contouring and support with this mattress.
One owner wrote: "Ridge formed in the middle. Needed to buy a mattress topper."
The initial 'airing out' period wherein the mattress needs to breathe every day for 20 minutes can be slightly inconvenient for some users.
At 31cm (about 12.2 inches) deep, it can sit high on a low bed frame.

If you're on the lookout for a mattress that offers outstanding support, impressive comfort, and that is built with sustainability in mind, the Silentnight Plant Based Box Top 1800 Pocket Mattress is one to consider. This uniquely designed mattress is constructed using plant-based materials and features sumptuous padding for that unbeatable luxury in your sleep. On paper the box top is an extra layer of padding fitted right to the edge of a mattress rated Medium, so I'd expect a cushioned surface that stops short of a deep sink. It's both indulgent comfort and personalised support packed into one superior sleeping platform. One owner did report a ridge forming in the middle, and that's the risk with a soft top on a single-sided mattress you can't flip.

Specifications

Delectable box top layer for extra cushioning and edge-to-edge sleep surface
Platinum comfort layer that mimics the snug feel of memory foam but with better breathability
800 Mirapocket® springs paired with 1000 mini springs for tailored support
Tencel™ Lyocell fabric casing for silky comfort and effective moisture regulation
Plant-based layers including bamboo, flax, aloe vera and Coir extracted from coconuts
Low maintenance single-sided design, with top-to-toe rotation recommended weekly for the first three months, then monthly
Soft to medium firmness suitable for different sleeping positions
Manufactured in the UK with a 5 Year Guarantee and 60 Day Comfort Trial

Suitability

With a soft to medium firmness level, this mattress is a great pick for both back and side sleepers. Averagely weighted people should find the support impeccable and satisfactory, irrespective of their preferred sleep position. On your side I'd expect your shoulder to sink into the box top, while the firmer centre third of the zoned springs supports your hips and waist. Those accustomed to sleeping on their backs may crave a tad more firmness for an enhanced contouring and support. However, the 800 finely crafted Mirapocket® springs balancing with 1000 mini springs work wonderfully to provide personalised support for your muscles, joints, and body contours.

Other Things Worth Mentioning

This mattress also has of a green thumb. Its plant-based layers, developed from natural fibres like bamboo, flax, and aloe vera, not only assure a comfy sleep but also contribute positively to the environment. The Lyocell cover is a fabric sourced from wood, described on the listing as soft and silky. You'll appreciate the natural cooling effects of the Lyocell cover which promotes airflow and aids in moisture regulation - a boon for hot sleepers. Also, the single-sided nature of this mattress translates to effortless upkeep and longevity of the product.

Reasons to Buy

If you've been hunting for a mattress that masterfully straddles comfort, support, and care for Mother Earth, the Silentnight Plant Based Box Top 1800 Pocket Mattress ticks all the right boxes. With its cleverly comfortable and supporting features, excellent breathability for cool nights, and low maintenance requirements, stepping into a worry-free, luxurious sleep each night is no more a dream. Plus, purchasing this mattress will be a step ahead towards a sustainable future - you sleep better and greener at the same time!

Published: 24 October 2024 · Updated: 15 March 2026 · Corrected: 11 October 2026

Written by Rebecca Brown, Staff Writer, Children's Sleep

Corrections

When we get something wrong, we fix it and say so here. All corrections

11 October 2026: We said this mattress had 1800 Mirapocket springs plus 1000 mini springs. It has 800 Mirapocket springs and 1000 mini springs.

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 Silentnight Plant Based Box Top 1800 Pocket Mattress may feel.

Soft

Soft Medium

Medium

Medium Firm

Firm

Extra Firm

Your weight

Price history

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

Lowest price we've recorded: £484.36
Lowest in the last 90 days: £518.00

Owner figures for Silentnight mattresses as a whole are in our mattress reliability report.

Reviews

Let us know your thoughts on a product or view reviews from others.

3.5 owner rating from 2 reviewsOur rating 4.1/5

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Questions and answers about the Silentnight Plant Based Box Top 1800 Pocket Mattress

Common questions answered by our team first, then questions shoppers asked the retailer, with the retailer’s own answers.

Common question

Is this mattress suitable for someone with allergies?

Answer: Yes, it is. This mattress is made from hypoallergenic materials which help to create an environment that is free from allergens thereby ensuring a cleaner and healthier sleep with minimal risk for allergy-induced reactions or respiratory problems. ~Becky

Common question

Would the mattress be a good fit for someone who sleeps on their back?

Answer: While it's medium in firmness which works adequately for back and side sleepers, for an even greater contouring and support, back sleepers might want to consider a slightly firmer mattress.

Common question

What kind of bedding would work best with the depth of this mattress?

Answer: The depth of this mattress is about 31cm, or approximately 12.2 inches, so you could opt for deep pocket fitted sheets to ensure proper fit and avoid any possible slippage during use.

Common question

Can this mattress be a reliable purchase for long term use?

Answer: Given that the mattress comes with a 5 year guarantee plus it is handcrafted in the UK, you can expect it to be a long-lasting and reliable addition to your home.

Common question

Does the mattress comply with fire safety regulations?

Answer: The mattress meets with BS7177: 2008 standard for home use. This assures high standards of quality and safety.

What makes the Silentnight Plant Based Box Top 1800 Pocket Mattress great?

We've expanded on the specifications of the product to better help you understand its benefits.

Flax

Flax and hemp are natural materials known for their exceptional qualities making the product highly breathable, allowing for effective moisture regulation and temperature control. This means that the Flax & Hemp comfort layer helps create a cool and comfortable sleep surface, ideal for those who tend to sleep hot or live in warmer climates.

31cm deep

One of the deeper mattresses available from any retailer, this is a very deep mattress and one that will require specialist deep fitted sheets if that's the direction you wish to go. The depth of a mattress does not always correlate to a decent product, however, it is always a fairly good indicator.

Medium

A Medium firmness mattress is the most common build offered due to the range of suitability offered in such a mattress. This type of mattress will be better suited toward averagely weighted people, while lighter people should opt for a medium-light, and heavier people considering a medium-firm.

Handcrafted in the UK

Handcrafted in the UK means that the product is built here, by people being paid a fair and honest wage using certified and safe products of good quality and construction. UK manufacturing is some of th best in the world and all of that is reflected in this product

Pillow Top

Many mattresses that you see that look really plush, do so because they feature a pillow top. Benefits of a pillow top mattress are increased comfort and luxury styling. Downsides are they can be a bit of a pain to get sheets over properly

Approved by the National Bed Federation

The NBF is one of the most prestigious awarding federations in the industry, helped slightly by the fact that it is one of the only, however, it is still a great source of comfort knowing that this product holds approval by the team

Fire Resistant

Fire resistant does not mean the product will never catch fire, rather, it will not go up in flames quite so quickly. Resistant to fire in the same way that I am resistant to kisses, sooner or later you end up giving in.

Mirapocket springs

Mirapocket is Silentnights own take on pocket springs, in this instance, mirapocket is better than miracoil in terms of the support structure offered and is the one to consider should your budget allow it.

Depth: 31cm

With a depth of 31cm, this mattress is quite thick and featuring a fair amount of heft. While quality is not necessarily determined by depth, it does go some way toward allowing good quality fillings.

5 year guarantee

A 5 year guarantee is a great indicator of the retailer believing in their product. Anything go wrong in the next 5 years, no drama, get it replaced.

Hypoallergenic

This product is unlikely to cause any sort of allergic reaction. Ideal if you suffer from any sort of allergy problems

Bamboo

Warranty: 5 Year Guarantee

Awards & accreditations: Handcrafted in the UK, Approved by the National Bed Federation

Allergy care: Hypoallergenic

Fire resistance: Conforms to BS7177: 2008, for use at home

Firmness: Medium

Single-sided: Yes

Support system: Mirapocket Springs

Finish: Pillow top

Mattress type: Hypoallergenic, Single-Sided Mattress

Cover: Bamboo, Pillow top

Comfort fillings: Flax

Videos about this mattress

Hand picked video that relates to the specifications of The Silentnight Plant Based Box Top 1800 Pocket Mattress

Silentnight Mirapocket

By United Beds

What are Pocket Springs?

By BedStar

What is a Pillow Top?

By JohnRyanByDesign

Mattress Online

By Mattress Online

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Guides this mattress is featured in

This mattress is listed in 4 of our guides because its build meets what each guide looks for. Each card says what that is.

Older sleepers guide
Why it’s featured
This guide lists medium and medium-firm pocket-sprung or hybrid mattresses with a springy top rather than memory foam, which are easier to turn on and get up from.
Includes comment from a registered clinician
Read the guide
Anti-allergy guide
Why it’s featured
This guide lists medium and medium-firm pocket-sprung or hybrid mattresses that the retailer sells as anti-allergy or hypoallergenic.
Read the guide
Lighter sleepers guide
Why it’s featured
This guide lists soft to medium mattresses without a memory foam top, unless latex is there too, which a lighter body can settle into.
Read the guide
Pregnancy guide
Why it’s featured
This guide lists soft-medium and medium pocket-sprung and hybrid mattresses, which suit side sleeping through pregnancy.
Read the guide

Clinicians comment on the condition in each guide, not on individual mattresses.

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.