Silentnight Geltex Ultra 4000 Boxtop Mattress Rated 5.0/5 based on 2 customer reviews
Silentnight Geltex Ultra 4000 Boxtop Mattress

Silentnight Geltex Ultra 4000 Boxtop Mattress

sleeping cat
53p per sleep based on average mattress lifespan
Small Double
King Size
Super King
With Divan Bed Set
With Ottoman Bed Set
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Tests & Verdict

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 12+ years of industry insight.

The Silentnight Geltex Ultra 4000 is a luxury mattress with all the bells and whistles. Combining a layer of Silentnight Geltex™ to keep you cool with a triple layer of 3000 Zoned Mirapocket springs, this mattress is perfect for those who need a little more support in their sleep while still being a medium tension. Whether you sleep on your back, side or stomach, this mattress should largely be suitable. It's even hand tufted for that traditional sleep surface. Need to rotate it? Not to worry! This mattress is an easy-to-care-for non-turn mattress with five years warranty.

Not so much a con, rather an observation. I've laid on mattresses with similar dual-support setups in the past and always found the 1000 mini/hybrid springs fairly pointless. The 3000 zoned mirapocket springs do more than enough to offer encouraging and pinpoint bounce back support that I'd argue you could get away without and just call it a Ultra 3000 Boxtop. Alas, the mattress is well reviewed and looks to be a future favourite.

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.

Combination sleeping, all positions sleeper icon
For combination sleepers
Suitable for back, stomach and side sleeping.
Temperature regulation icon
Great temperature regulation
Breathable materials keep you cooler.
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.
Sleep apnea icon
Helps those with sleep apnea
Soft and medium tensions promote side sleeping.
Snoring icon
Helps prevent snoring
Promotes side sleeping which stops snoring.
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.

Still not sure if the Silentnight Geltex Ultra 4000 Boxtop Mattress is suitable for you? Answer 4 simple questions with our quiz.

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Why our sleep experts loved it

Today we're looking at the new Silentnight Geltex Ultra 4000 Boxtop Mattress which looks to be a unique offering from Bensons for Beds. For those that don't know, Silentnight is one of the largest mattress manufacturers who prove particularly strong in the online segment and looks to be continuing that trend with the new Feltex Ultra range.

Let's break down the layers and see what we're working with.

To start, the support layer. With a combination of 3000 zoned mirapocket springs combined with an additional layer of 1000 mini springs you end up with a combined 4000 springs to help ensure that your body contours sufficiently as you sleep. The medium tension means that these springs will allow a decent amount of "give" to them that will suit both back and side sleepers. 

The pocket springs are my favourite mattress support and with good reason, the contouring around your body is better and the longevity too, making pocket springs the ideal premium-buy when it comes to support layers

Onto the comfort layer and we've got another favourite in Geltex. Geltex is Silentnights version of Gel layers for mattresses and it does a great job of proving a breathable, soft and squishy top layer. What makes Gel a better option than other comfort layers is that it can keep you the right temperature as you sleep proving to be not too hot, nor too cold. In this instance the Geltex Ultra 4000 Boxtop Mattress comes with a generous helping of the material to ensure adequate body-hugging comfort that pairs wonderfully with the springs below.

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How does it feel?

Personalised feel depends on bodyweight. Adjust your weight below to get an indication of how the Silentnight Geltex Ultra 4000 Boxtop Mattress may feel.

weight description image
Quantitative Measurements KPI question mark
Of The Silentnight Geltex Ultra 4000 Boxtop 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.


*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.


  • 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.


  • 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.

Brand Rating

  • Overall Brand Rating
  • This is based on community driven customer reviews tied to product reviews and grouped together at a brand level to produce a score.


Let us know your thoughts on a product or view reviews from others. Please note that WantMattress does not verify whether the user has used or purchased the product.

5 - 2 reviews

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Miss Moreno
via Bensons For Beds
Most comfortable mattress ever!
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Mr Gary Horner
via Bensons For Beds
Great mattress

Questions and Answers About The Silentnight Geltex Ultra 4000 Boxtop Mattress

Prospective customers had the following questions about the product

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What is Geltex and how does it benefit my sleep?

Answer: Geltex is a unique material that combines gel and foam properties. It offers excellent breathability, allowing for better temperature regulation. It also provides a 'bounce-back' effect, making it easier for you to move around during sleep. This can help you feel more refreshed and energized in the morning.
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Can you explain the triple layer of springs?

Answer: Certainly! The mattress features a triple layer of springs, including 3000 Zoned Mirapocket springs and an additional 1000 Ultra Mini-Springs. These layers work in harmony to provide targeted support where you need it most, such as the lumbar region, while also minimizing motion transfer.
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Verified Buyer
What's the significance of the mattress being handmade in Britain?

Answer: Handmade products often have a higher level of craftsmanship and quality control. Being made in Britain also supports local industries and ensures that the mattress meets stringent UK manufacturing standards.
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What does the term 'Boxtop' mean?

Answer: Boxtop refers to an additional layer of cushioning material that is sewn onto the top of the mattress. This adds an extra layer of comfort and luxury, making the mattress feel more plush and inviting.
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How does this mattress compare to other Silentnight mattresses?

Answer: This particular model is one of the more luxurious options in the Silentnight range, featuring advanced technologies like Geltex and a triple layer of springs for enhanced comfort and support.
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Is this mattress eco-friendly?

Answer: Yes, the mattress is made using sustainable materials, aligning with environmentally friendly practices. This is a great option for those who are conscious about their ecological footprint.
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How do I care for this mattress?

Answer: The mattress is designed to be easy-care, meaning you don't have to flip it. However, it's recommended to rotate the mattress regularly to ensure even wear and prolong its lifespan.
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What's the comfort rating of this mattress?

Answer: The mattress has a medium comfort rating which makes it versatile and suitable for a wide range of sleepers including side back and stomach sleepers.
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Verified Buyer
What does the 5-year guarantee cover?

Answer: The 5-year guarantee covers any manufacturing defects, giving you peace of mind that you're investing in a quality product.
Of The Silentnight Geltex Ultra 4000 Boxtop Mattress
Brand: Silentnight
Retailer: Bensons For Beds
Delivery Time: Average
Delivery Charge: Excellent
Customer Sentiment: Excellent
Guarantee: Good

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 Silentnight Geltex Ultra 4000 Boxtop Mattress

Silentnight Brand Video
Silentnight Brand Video
By Bensons for Beds
What are Pocket Springs?
What are Pocket Springs?
By BedStar
Benefits of Gel Mattresses
Benefits of Gel Mattresses
By BedStar
Silentnight Mirapocket
Silentnight Mirapocket
By United Beds

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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.

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