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Dorma Mattress Topper

Dorma Mattress Topper UK (2023)

Last updated: 31.10.2023 Reading time: 12 Min.

The Dorma Tencel Blend Memory Foam Mattress Topper is one of the best mattress toppers on the market, or so we’ve heard.

This topper has an impressive 4.7 stars and over 2,400 reviews on Dunelm.

Dorma also offers a few other mattress toppers, such as the Dorma Full Forever Mattress Anti-Allergy Mattress Topper and the Dorma Sumptuous Soft Mattress Topper.

In this mattress topper review, we talk exclusively about Dorma’s most popular Tencel Blend Memory Foam topper and whether it lives up to the hype.

people sat on mattress topper

Top features of the Dorma mattress topper

10-year guarantee
10-Year Guarantee
Environmentally Friendly
Highly-rated product
Highly-Rated Product
Memory foam
Memory Foam


  • Memory foam filling that curves to your body.
  • Pressure-relieving capabilities.
  • Breathable Tencel cover with moisture-wicking effect.
  • Different sizes to choose from.
  • 10-year guarantee.
  • Free delivery and returns.


  • Might be too soft for people with bad backs.
  • Memory foam retains heat and can be too hot for some people.

What makes the Dorma mattress topper special?

  • Plush memory foam filling with pressure-relieving properties.
  • Breathable and moisture-wicking Tencel blend cover.
  • Available in four sizes: single, double, king and super king.
  • 10-year guarantee.

How we test products

Our mission is to take the guesswork out of finding the perfect sleep products.

We've dedicated hundreds of hours to testing mattresses and sleep accessories, and rely on a team of testers of differing weights, temperature preferences, and sleeping positions to evaluate each product. 

Tested products are granted the Sleep Hero tested stamp of approval, a mark of our review's reliability.

To learn more about our testing process, check out our methodology page.

If we haven't personally tested a product, please be assured that we invest significant time and energy into scouring the UK market and researching the best recommendations, and we work with a team of sleep experts who review our articles, ensuring that the insights we provide are not only relatable but also reliable.

Who is Dorma?

Dorma is a homeware retailer carried exclusively by Dunelm in the UK.

They are known for their luxurious bedding, from mattress toppers and duvets to pillowcases and high thread count sheets. 🛌

They also carry curtains, cushions and towels to finish your bedroom in style.


Dorma mattress topper composition

The Dunelm Dorma Mattress Topper is popular with customers and contains some excellent materials for a comfortable night's sleep.

The main features include:

  • Soft memory foam filling with pressure-relieving and heat-retaining capabilities.
  • Breathable Tencel cover made through a non-toxic process.
  • Hypoallergenic properties for allergy sufferers.
  • Available in single, double, king and super-king sizes.

We take a closer look at each of these elements further down. 👇


Is the Dorma mattress topper comfortable?

Comfort is the big selling point for sleep products, so we assessed whether the Dorma mattress topper is up to standard.

Pressure-relieving memory foam filling

The Dorma memory foam mattress topper is medium firm, balancing a soft, luxurious feel with pressure-relieving support.

hand lifting memory foam
A memory foam topper can transform your bed.

Memory foam moulds to the contours of your body through weight and heat.

The viscoelastic cells inside memory foam adapt to your shape, alleviating pressure on your hips and shoulders.

Once you reduce stress on those pressure points, you reduce the chance of waking up with aches and pains and encourage better sleep patterns.

And don't worry, when you get out of bed, the memory foam slowly bounces back and returns to its original shape.

Keeps you warm at night

Memory foam is known for its heat retention properties.

The topper's dense structure and limited air circulation trap body heat and keep you toasty warm in winter.

However, this memory foam topper may be too warm in summer. ☀️

temperature of memory foam vs pocket spring
Pocket spring mattresses tend to be much cooler than memory foam.

If you're a hot sleeper, we recommend the Simba mattress topper for a cooler alternative.

Breathable Tencel cover

The Dorma mattress topper has a cover made from 36% Tencel, 36% polyamide and 28% polyester.

Tencel is derived from cellulose fibres through a non-toxic process, making it eco-friendly.

It is a highly breathable material that encourages better air circulation to keep you cool at night.

dorma mattress topper on bed
The Dorma mattress topper looks so cosy!

Tencel is also moisture-wicking, absorbing your sweat, transferring it through the fabric, and evaporating from the other side.

This keeps your skin and bedding dry even if you're having a hot flush at night.


However, the Tencel cover can only do so much, and it cannot completely counteract the heat retention tendencies of memory foam.

If you're a hot sleeper, we recommend opting for a cooling mattress topper instead.

Who is the Dorma mattress topper suitable for?

The Dorma Tencel mattress topper is comfortable for a wide range of people, from allergy sufferers to side sleepers.

Allergy sufferers

The topper's Tencel cover boasts hypoallergenic properties, providing a fresh and allergen-resistant sleep surface.

woman sneezing
Keep your allergies at bay with a hypoallergenic mattress topper.

The Tencel fabric's natural moisture-wicking abilities help to deter the growth of allergens like dust mites and mould.

This keeps your topper clean and hygienic, even if you're a sweaty sleeper.

Say goodbye to restless nights caused by sneezing and itching this summer.


For couples sharing a bed, the Dorma memory foam mattress topper is a true blessing.

Its motion isolation capabilities mean that any movement on one side of the bed won't disturb the other sleeper. 🙌

couple sleeping in bed
Stay still when your partner moves at night.

No more waking up when your partner tosses and turns, just undisturbed bliss!

Side sleepers

The Dorma Tencel mattress topper is ideal for side sleepers.

side sleeper pressure points
Even a soft memory foam topper can relieve the different pressure points.

The memory foam embraces the curves of your body, providing the necessary support to relieve pressure points.

The softness of the memory foam allows your body to sink in slightly so you can enjoy a cosy slumber.

With the Dorma mattress topper, side sleepers can wake up feeling refreshed and ready to take on the day.

Eco-conscious people

The Dorma mattress topper's memory foam core is Certipur-approved.

This means the foam is free from harmful substances such as ozone depleters, PBDEs, TDCPP flame retardants, heavy metals, and formaldehyde.

It's a great choice for eco-conscious individuals seeking a sustainable mattress topper.


Who is the Dorma mattress topper not suitable for?

Unfortunately, the Dorma Tencel Memory Foam Mattress Topper doesn’t work for everyone.

After all, everyone has different needs when it comes to their sleeping habits.

Front sleepers

Front sleepers typically need a firm mattress or topper to prevent excessive sinking and maintain optimal spinal alignment throughout the night.

The medium firmness of the Dorma topper might cause front sleepers to sink in too much, leading to potential discomfort and strain on their neck and back.

Man sleeping on his front
Front sleepers are better with a firm mattress.

We recommend the Emma Flip Mattress Topper for stomach sleepers.

Hot sleepers

As we mentioned earlier, memory foam retains heat, making it difficult for hot sleepers to keep their body temperature down. 🔥

While the Tencel cover provides some breathability, it is not enough to balance the heat retention of the memory foam filling.

For hot sleepers, we recommend a cooling mattress topper instead.

Dorma mattress topper guarantee

With a 10-year guarantee, you can rest assured that the Dorma Mattress Topper is built to last, offering peace of mind for long-term use.

When you divide the cost of the mattress topper by the 10-year guarantee, it's absolutely worth the money to make your bed a little cosier.


Dorma mattress topper delivery

Dunelm offers free standard delivery on orders over a certain amount.

You can get the topper to your doorstep without any extra cost.

For those who can't wait to experience the comfort of the topper, express delivery is available for a small fee.

If you prefer a more personal touch, the Click and Collect service is free, allowing you to pick up your purchase at your convenience.


Dorma mattress topper returns

If the topper doesn't meet your expectations, Dunelm's returns policy allows you to easily return or exchange it within 28 days of purchase.

returns process diagram

And guess what? The return process is completely free!


Is the Dorma mattress topper worth it?

When it comes to a Dunlem mattress topper, Dorma has it covered.

The Dorma Tencel Blend Memory Foam Mattress Topper is comfortable and good quality for most people.

The memory foam filling combined with the breathable Tencel cover provides a cosy sleeping environment for side sleepers in winter.

However, this isn't the topper for you if you are a hot sleeper or struggle to get a good night’s sleep with a bad back.


Frequently asked questions

  • What sizes is the Dorma mattress topper available in?

    The Dorma mattress topper is available in a range of UK sizes, excluding small double mattresses. 


    • Dorma mattress topper single - 90 x 190 cm (35' x 74")
    • Dorma Tencel Blend Memory Foam Mattress Topper double - 135 x 190 cm (53' x 74")
    • Dorma mattress topper king size - 150 x 200 cm (59' x 200")
    • Dorma mattress topper super king - 180 x 200 cm (71' x 200")
  • Can you wash the Dorma mattress topper?

    Unfortunately, the Dorma mattress topper cover is not removable, so you can’t just throw it in the washing machine and be done. 

    The memory foam filling is also not machine washable

    However, overcoming this issue is relatively simple. 

    To keep the topper clean and fresh, use a mattress protector and bedding, which can be easily removed and washed regularly. 

    Regularly washing the protector and bedding ensures that your topper stays hygienic and in excellent condition for a long time. 

    A mattress protector is a barrier, safeguarding the topper from spills, stains, and dust, while bedding helps maintain a clean sleeping environment. 

  • What is the comfiest type of mattress topper?

    The comfiest type of mattress topper depends on individual preferences and needs. 

    Memory foam toppers are often considered one of the most comfortable options, as they contour to the shape of your body, providing excellent support and pressure relief.

    Gel-infused memory foam toppers offer additional cooling properties, making them ideal for hot sleepers. 

    On the other hand, natural latex toppers are hypoallergenic, breathable, and resilient, offering a bouncy yet supportive feel. 

    Feather or down toppers provide a plush and luxurious surface, perfect for those seeking a soft and cosy sleep experience. 

    Ultimately, the comfiest mattress topper will vary from person to person based on their specific comfort requirements.

  • Can a mattress topper make a mattress better?

    Absolutely! A mattress topper can significantly improve the comfort and support of your mattress. 

    Whether your mattress is too firm or soft, the right topper can adjust the overall feel to better suit your needs. 

    For instance, if your mattress lacks cushioning, adding a memory foam or latex topper can enhance its comfort level, providing a more plush and supportive surface. 

    Similarly, a feather or down topper can add an extra layer of softness to a firm mattress. 

    Mattress toppers can extend the life of your mattress by offering an additional protective layer, helping to reduce wear and tear.

  • When should I not use a mattress topper?

    While mattress toppers generally benefit most sleepers, there are a few scenarios when they might not be suitable. 

    If your mattress is already in excellent condition and meets your comfort requirements, adding a topper might not be necessary. 

    If your mattress is sagging, lumpy, or damaged, a topper will not fix the underlying issues and may not provide the desired support. 

    In such cases, investing in a new mattress is a better long-term solution

    Moreover, some people may have allergies or sensitivities to certain materials used in mattress toppers. 

    In such instances, choosing hypoallergenic options or consulting with a healthcare professional before using a topper is essential.

  • Can you put a fitted sheet over a mattress topper?

    Yes, you can use a fitted sheet over a mattress topper. 

    Fitted sheets are designed to accommodate the additional depth of a topper and the mattress. 

    When selecting a fitted sheet, consider the combined thickness of your mattress and topper to ensure a proper fit. 

    Most standard fitted sheets can accommodate mattress toppers up to a certain thickness. 

    However, if your topper is exceptionally thick, you might need to look for deep-pocket fitted sheets designed explicitly for use with thicker mattresses and toppers. 

    Using a fitted sheet over your mattress topper keeps it in place and ensures a neat and tidy bed appearance.

George arkley image


Content Writer

I’m always the first person to try the latest sleep hack - whether it’s drinking coffee or counting sheep. Now, I get to write about the latest sleep gadgets, mattresses and much more in a bid to help you find the perfect night’s sleep.

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