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

Silentnight Geltex Ultra 4000 Boxtop Mattress

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5.0/5 - Read 2 Reviews
sleeping cat
53p per sleep based on average mattress lifespan
Single3' x 6'3
Small Double4' x 6'3
Double4'3 x 6'3
King Size5'0 x 6'6
Super King6'0 x 6'6
With Divan Bed Set
With Ottoman Bed Set
snooze score logo Find out if the Silentnight Geltex Ultra 4000 Boxtop Mattress is suitable for you by answering 4 simple questions. Take the quiz

Why Our Sleep Experts Loved It

becky says

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.

How does it feel?

Firmness of The Silentnight Geltex Ultra 4000 Boxtop Mattress depends on bodyweight. Adjust your weight below to get an indication of how it may feel. Remember though that firmness is entirely subjective.
weight description image

Reasons to Buy

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.

Reasons to Avoid

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.

Key Performance Indicators KPI question mark
Of The Silentnight Geltex Ultra 4000 Boxtop Mattress
Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews.

Key Performance Indicators KPI question mark

Our Key Performance Indicators are produced using a combination of specification-heavy algoritmic data points and user reviews. For example, a firm pocket spring support layer is more breathable and offers better back support but may prove unsuitable for side sleepers, the reverse is true for a soft-medium tension reflex foam support layer. This is one of 100+ datapoints considered when generating the below ratings.


*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.
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.

What Makes The Silentnight Geltex Ultra 4000 Boxtop Mattress Great?

Made exclusively for Bensons for Beds

This product is exclusive to Bensons for Beds and cannot be purchased elsewhere. That's not to say you can't get a discount though, head over to our voucher codes section against the retailer to see if we can get you a deal on this product

Features Silentnight Geltex™ Layer for a cooler sleep & easy movement

Silentnight Geltex™ is a gel based top comfort layer that has a similar feeling to latex and memory foam whereby you have a sinking yet floating sensation that offers supreme luxury at a fair price point. The main benefit to geltex is that you don't suffer from heat problems that plague memory foam comfort layers in other mattresses.

Superior triple layer of 3000 Zoned Mirapocket springs

Typically, the more springs the better. The average mattress has around 1000 springs and so anything more than that is considered good. The firmness/tension of a mattress is also not dictated by the amount of springs and so you do not need to worry about the firmness being unsuitable when it comes to spring count. Simply the more springs, the better the mattress can contour to your body. 3000 springs is considered great.

1000 layer of responsive Ultra Mini-Springs

Made from 1000 mini pocket springs, UltraFlex© is highly elasticated, allowing for greater 'bounce back'. It supports free movement and its breathable open-cell structure helps to prevent overheating, by allowing air to pass through the mattress.

Hand tufted for a traditional sleep surface with a deluxe Boxtop

The tufting holds all mattress fillings together, this gives a slightly firmer feel and prevents sagging of the mattress in the middle while offering well rounded support up to the edges.

Firmness rating: Medium

A medium tension mattress is largely suitable for most people of average BMI. Not too soft, nor too firm this mattress has enough softness in the tension to allow you to sink, while providing enough support to contour to your body.

Easy care non-turn mattress, simply rotate

This mattress has the comfort layer on one side only. This means you benefit from additional cost savings while also saving you the hassle of having to flip the mattress along with every rotation. The downside is that settlement over time may be more prevalent however, the cost savings and guarantee more than make up for it. 

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

Mattress height: 38cm

38cm is a fairly substantial depth for a mattress. While a thick mattress is not indicative of greater quality, it's easy to see that a bigger depth gives more room for fillings and good quality spring systems. 

5-year guarantee

This is an exceptional guarantee that is fairly uncommon within the industry, this shows that the retailer and supplier both have huge confidence in the product that they are selling. Any problems in the first 5 years? Call them and they will sort it.

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Customer Reviews For The Silentnight Geltex Ultra 4000 Boxtop Mattress

Based on 2 reviews

Most comfortable mattress ever!


Great mattress

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