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Tweak Duo Mattress Review

Last Updated: July 5, 2021

In this Tweak Duo mattress review, we uncover and show you why this customisable mattress is the perfect option for couples without either of you having to compromise.

It is always great to review a mattress that does things a bit differently, “tweak” things up a bit.

Here we will get into the materials used, what makes this mattress stand out and a lot more.

Below is our full Tweak Duo mattress review (SUMMARY AT THE END).   

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Tweak Duo Mattress Construction

The Tweak Duo mattress has a unique 3-layer design. A top open-cell polyurethane layer followed by a customisable and interchangeable comfort layer and finally supported by a layer of pocket springs. Tweak Slumber is also committed to reducing its environmental impact. All Duo mattresses are made locally here in the UK and meet all health and safety requirements.  

The foams in their mattresses have been assessed by EUROPUR as well as the SPSC (Sleep Products Safety Council) and their manufacturer is a certified FIRA Gold member.

tweak duo mattress layers review
(Image credit: Tweak Slumber)

Tweak Duo Cover  

The Duo mattress cover is a visco-elastic polyester blend. Visco-elasticity helps isolate vibration, dissipate energy (heat) and is quick-drying in nature. The make-up of the cover also allows for easy airflow for maximum breathability.  

The Tweak Slumber Duo mattress cover is also practical, it includes 2 handles on each side (8 in total) for easy manoeuvring. The mattress is not only dust-mite resistant, but the cover is also hypoallergenic making this a perfect option for those with sensitive skin. Hygiene is also made simple by Tweak Slumber, the cover is made to be easily unzipped and machine washed. The cover ticks all the boxes for us!     

Tweak Duo Mattress Layers

1. Open-Cell Polyurethane Layer (4cm) 

The open-cell structure of this top foam layer allows for more airflow than regular polyurethane foam. Polyurethane is also more breathable and responsive than other foams such as memory foam, it adjusts to your positioning almost immediately.    

tweak duo mattress top layer
(Image credit: Tweak Slumber)

2. Customisable Poly Foam Layer (10cm)  

This is the layer we have been waiting to talk about. This is the visco-elastic comfort layer, it is very responsive and quickly conforms to your body shape.

This unique split layer is interchangeable and customisable. You have the option to select your own comfort layer for your side of the bed (soft, medium or firm), making it a great option for couples as compared to the other online mattress brands that follow the “one size fits all ” approach. 

What we particularly appreciate is the flushness of the two sides so it still feels like you are sharing the same bed and not two separate mattresses. By having two separate comfort layers it also helps to minimise motion transfer from one side of the bed to the other.

Tweak Slumber found an issue many couples are currently facing and came up with a win-win situation.   

tweak duo customisable layer
(Image credit: Tweak Slumber)
duo customisable layer
(Image credit: Tweak Slumber)

3. Pocket Sprung Base Layer (10cm)  

The support of the mattress comes from its 1000 full-sized pocket springs. They are individually wrapped, this ensures independent movement so you can move without your partner feeling any motion transfer. Generally, foam only mattresses don’t have enough edge support but the full-size springs minimise this issue and reduce edge collapse.   

spring layer
(Image credit: Tweak Slumber)

How Thick Is The Tweak Duo Mattress?  

The total mattress thickness including its cover is 25cm, so your current bed sheets would fit. The Tweak Duo mattress can also hold up to 16 stone or 101 kg per side.   

How Firm Is the Tweak Duo Mattress? 

From our Tweak Duo mattress review, we give it a 5,5 – 7,5 out of 10 on the firmness scale. Of course depending on which firmness you choose.   

tweak slumber duo firmness review
(Image credit: The Mattress Guide)

We really enjoy seeing a brand break the stereotypical one size fits all and offer an uncomplicated range of comfort.  

Aesthetics and Design  

The Tweak Slumber Duo mattress follows the neutral colour mix. The white, grey and blue Duo make it a great addition to nearly every room setting (that’s if you don’t cover it).  

design review
(Image credit: Tweak Slumber)

Tweak Duo Trial Period and Warranty

All Tweak Duo mattresses come with a 100-night trial. This means instead of trying a mattress in a traditional mattress retailer, you get to try the mattress in the comfort of your own home (without the salesman staring at you). If you are not 100% satisfied with the mattress you can return it and get a full refund.   

The mattress is delivered free of charge and returns are done at no cost to you.        

The Duo mattress also comes with a 10-year warranty, this ensures safety in the long run as well and shows the confidence Tweak Slumber have in their mattresses.         

Tweak Duo Mattress Delivery 

This is the first mattress we have reviewed that did not come in a box. It is vacuum-sealed and delivered wrapped in protective green plastic. We were genuinely concerned that it is not delivered in a box, however, what changed our minds was when it was delivered with a 2-man service. They will take the mattress to your room of choice and set it up, the delivery company is very professional and they offer planned deliveries if you need it on a specific weekday.  

The delivery period is a bit slow compared to the other mattress brands we have reviewed here in the UK, you can wait up to 15 days.

Additional Services  

Tweak Slumber also offers old mattress removal at a cost of £30, make sure to choose this option at the checkout and for those who can only take delivery on a Saturday, there is also an option for this at an additional fee.    

Payment Options

  • Debit/Credit Card  
  • Paypal
  • Apple Pay
  • Dividebuy (0% instalments)

Tweak Duo Price and Sizes

We understand that price is also a huge factor when purchasing a new mattress, that’s why we have inserted a table for this Tweak Duo mattress review down below.   

These are standard prices make sure to have a look at the DISCOUNT CODES we have here for huge exclusive deals. What is also great is that the price will not change depending on the firmness you select.   

SIZEDIMENSIONSPRICE (excl. discount code)
Tweak Duo Double size mattress135x190x25 cm£795
Tweak Duo King size mattress150x200x25 cm£895
Tweak Duo Super king size mattress180x200x25 cm£995

*prices and availability may be subject to change 

Tweak Duo Customer Reviews

We hope to give you as many insights as we can in this Tweak Duo mattress review, we recommend you to see what current customers have said about the Duo.

It is always wise to take a look at what some existing customers have said about the product. You can find these either on the site itself or from third parties.

Tweak Duo Mattress Awards  

Below is Tweak Slumber Duos most recent award as well as our very own Best Mattress for Couples Winner.

  1. The Mattress Guide Best Mattress for Couples
  2. Good Housekeeping Institute Approved


  • If you feel the comfort layer you have chosen does not suit you perfectly you can opt for another at no extra cost to you within the 100-night trial.  
  • The returned mattresses are either donated to charities or broken down and recycled for use in other industries.             

Should I Buy a Tweak Duo Mattress? 

To conclude and to share our final thoughts on this Tweak Duo mattress review, we would recommend the Tweak Duo mattress to those looking for:     

  • A customisable mattress.    
  • A hybrid mattress made from high-quality materials in the UK.    
  • A mattress that includes excellent service and support.        
£100 OFF
tweak slumber discount code voucher uk
Tweak Slumber Discount Voucher Code
Save £100 on the Tweak mattress! | T&Cs apply.
Save £100 on the Tweak mattress! | T&Cs apply. Show Less
Tweak Duo Mattress Review
Material Quality
Motion Isolation
Edge Support
Sex/ Bounce
Company Reputation
Value for Money
100-night risk-free trial
10-year warranty
Free delivery and returns
Machine washable cover
Mattress Handles
Customisable comfort option
Long delivery period

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Material Quality
Motion Isolation
Edge Support
Sex/ Bounce
Company Reputation
Value for Money
Final Score


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