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.
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.
What is a mattress topper?
A mattress topper goes on top of the mattress, adding a layer of comfort and extra support.
It can improve and change the feel of your current mattress that doesn't feel comfortable.
A memory foam mattress topper can even soften the feel of a new mattress that is too firm. 🧸
Are memory foam toppers any good?
Memory foam is arguably the best material for a mattress topper. 👑
Perhaps we’re biased - but memory foam has a blissful, cloud-like feeling that no other material can replicate.
But how does it work?
Memory foam responds to the heat and pressure of the body. 🌡️
The images below show you how this works:
Memory foam is made of unique viscoelastic cells, which adapt to your body shape under heat and pressure.
This helps to alleviate stress on crucial pressure points such as the shoulders and hips, promoting healthier sleep patterns and reducing the likelihood of waking up with aches and pains.
Once you remove the pressure, like when you get up, the foam gradually returns to its original shape.
Which memory foam mattress topper is best for me?
Most memory foam mattress toppers will provide pressure relief, support and enhanced comfort to your sleep. 😍
But some memory foam toppers have specific features that make them suitable for different criteria.
So, which memory foam mattress topper can solve your sleep dilemma? 🧐
Can a memory foam mattress topper make my mattress softer?
A memory foam topper can certainly soften the feel of most mattresses.
Memory foam is soft and body-hugging, like sleeping on a cloud.
A memory foam topper moulds around sensitive areas and relieves pressure.
This makes them ideal for side sleepers who need to sink more into their mattress.
The Tempur Mattress Topper 7 is one of the softest and most luxurious memory foam toppers. ✨
You’ll feel almost weightless on the highly sensitive Tempur material, providing immediate pressure relief to the hips and shoulders. 🎈
Can a memory foam mattress topper make my mattress firmer?
Memory foam comes in various densities and reacts to the body differently. 👀
Some memory foam mattress toppers use firm-feeling foam, which can provide support to a soft mattress.
This helps to prevent the spine from bending and keep it in a neutral alignment.
Memory foam toppers tend to be soft, so if you're looking for a firm topper, consider alternatives.
We tested this mattress topper ourselves and found it made our mattress feel much firmer and more stable. 🧱
Our guide on the best firm mattress toppers has even more recommendations.
Can a memory foam mattress topper make me feel warmer?
Memory foam retains heat during the night.
Therefore, it’s an excellent material for those looking for a warmer sleep. 🔥
Memory foam stores heat up from the body, warming up any surrounding material.
Most memory foam mattress toppers will help to keep you warm and cosy during colder months. ☃️
Can a memory foam mattress topper make me feel cooler?
Some memory foam toppers come with cooling technology. ❄️
A cool mattress topper can help to encourage better temperature regulation in your sleep.
The Panda mattress topper uses gel-infused cooling technology and a natural moisture-wicking bamboo cover.
This combination provides a breathable layer of comfort for a cooler sleep. 🌬️
However, if you’re typically a hot sleeper, you should probably avoid memory foam altogether. 👎
Instead, consider natural toppers made with latex, cotton or wool.
Our favourite cool mattress toppers:
Memory foam mattress topper sizes
Memory foam mattress toppers come in standard UK bed sizes.
- Memory foam mattress topper single - 90 x 190 cm (3’ x 6’3")
- Small double memory foam mattress topper - 120 x 190 cm (4’ x 6’3")
- Memory foam mattress topper double - 135 x 190 cm (4’6" x 6’3")
- King size memory foam mattress topper - 150 x 200 cm (5’ x 6’6”)
- Memory foam mattress topper super king size - 180 x 200 cm (6’ x 6’6”)
For a double bed, a double mattress topper should fit right up to the edge of the mattress. 👌
You should check the size of your mattress before making a purchase.
How do I attach a memory foam mattress topper?
A mattress topper sits on top of your mattress - but how does it stay there?
This may be a concern if you’re a particularly fidgety sleeper. 🤸♂️
Luckily, most mattress toppers come with straps on each corner or an anti-slip base on each corner.
This helps the mattress stay in place to avoid disrupting your sleep.
Your mattress protector and fitted sheets will also help keep the topper fixed in place.
We recommend a mattress protector made from natural fibres for memory foam toppers, which will encourage temperature regulation.
Our favourite mattress protectors:
How long does a memory foam mattress topper last?
The lifespan of your memory foam mattress topper can vary depending on the quality of the foam.
Some memory foam is high-quality and designed to last, while cheap foams can sag and become indented quickly. ⏳
However, you should rotate your mattress topper regularly to encourage the material to keep its shape.
Memory foam mattress toppers come with warranties anywhere between 1 - 10 years.
A mattress topper guarantee protects you from material defects such as dipping.
Many memory foam mattress toppers also include a sleep trial for some extra peace of mind when making a purchase.
This means you can test out the topper and return it for a full refund if you don’t get on with it. 💰