Best Double Mattress: A Guide for Selecting the Perfect One

The best mattress is a very important purchase you need to make when buying a new bed for your child.

If you are not careful, you may end up making the wrong choice and it can lead to sleeping problems or even backaches later on in life. Here are some things to watch out for when looking at what type of bedding to buy.

Best UK double mattresses 2021

1. Simba Hybrid Mattress

The Simba is the perfect mattress if you are looking for a great night’s sleep. It provides complete support to your body, so there is no more turning and twitching trying to get comfortable.

The memory foam layer of hybrid mattresses is incredibly soft and conforms to your body perfectly, providing pressure relief for your joints.

The top layer of the mattress is a classic spring layer that provides support and helps bounce. The mattress comes with a 10-year guarantee, so you never have to worry about buying again.


  • Doesn’t need turning over to stay comfortable
  • Pressure-relieving and provides great support for the body
  • 10-year guarantee


  • May be too firm for some people 

2. Emma Original mattress

The Emma mattress is a great mattress for your child’s first adult bed. It provides firm support and won’t break the bank, but it will still provide a wonderful night’s sleep for your child.

Foam layers are wrapped in soft fabric that makes lying on the bed incredibly comfortable. This mattress comes with a 5-year guarantee, so you won’t have to worry about buying again any time soon.


  • Firm support that will last
  • Not too expensive
  • Bouncy to help them move around in their sleep


  • Might not be firm enough for some people’s taste
  • Some complaints that the mattress was too thick when it arrived, making fitting sheets difficult.

3. Eve Original Mattress

The Eve Original Mattress is an advanced mattress that provides all the support your child needs. The combination of memory foam and a classic spring layer provides bouncability and comfort that will allow them to get an excellent night’s sleep.

This mattress comes with a 5-year guarantee so you can be sure it is built to last, and it comes at a very reasonable price, so you don’t need to worry about spending too much money.


  • Memory foam helps keep cool at the night
  • Bouncability provides an excellent night’s sleep without getting stuck in one position all night long.


  • Some complaints that the mattress is too bouncy
  • A few complaints of it being too firm

4. Dormeo Octasmart Plus Memory Foam Mattress

The Dormeo Octasmart Plus is the best memory foam mattress you can buy for your child’s first adult bed.

The unique design provides relief, prevents backaches, and keeps them cool in the night without them having to move around too much. It comes with a 5-year guarantee so you know that it is built to last. It comes at a reasonable price, so you don’t need to worry about breaking the bank.


  • The innovative design keeps your child cool at the night without them having to move around much
  • Provides excellent support for joints
  • Comes with a 5-year guarantee


  • It may be too firm for children with special needs
  • Some complaints that it doesn’t stay cool all night long

5. Tempur Sensation Elite mattress

The Tempur Sensation Elite mattress has a unique design that provides support for joints. If you are looking for complete comfort when you sleep, look no further.

The memory foam layer is incredibly soft and it provides the perfect amount of sink so your body is fully supported in any position. It also comes with a 10-year guarantee for complete peace of mind, and it is incredibly comfortable and firm, so your child will get a great night’s sleep every night.


  • Provides pressure relief for joints
  • Comes with a 10-year guarantee


  • Too firm for some people’s taste
  • It takes a while to expand fully once it is unpacked
  • Pricey option for most people

How big is a double mattress?

The standard size for this mattress is 135 cm x 190 cm. These mattresses are the perfect fit for most standard double beds. They come with two pillows and two duvets.

If you want to move your child into an adult bed, this is the perfect size for them to become accustomed to sleeping on their own bed without being overwhelmed.

What are the benefits?

  1. It provides you with more space to sleep in luxury.
  2. If you have a king-size duvet it will fit nicely on this bed.
  3. If you suffer from back pain or have any other issues that would require you to have extra support, then choosing to have a double or even king-size mattress is perfect. You are sure to get a comfortable night’s sleep without waking up in pain or with aches and stiffness.

Who needs a double mattress?

Most adult beds come in a double size. If you have a spare room and want to move your child up from the cot, this is the perfect upgrade for them to get used to having their own space.

It will get them accustomed to sleeping on their own bed without being too overwhelming. You can get extra pillows and duvets if you need them to make your child feel more at home.

How Do I Know What Size My Bed Is?

Your frame will tell you what size your bed is as it should be clearly written on there. If not, then measuring the width of your bed is easy and simple so you can find out the exact measurements quickly.

Measure from one side to another and ensure that all four corners are touching properly with no gaps in between them.

Common UK Mattress Sizes

  • Single Mattress: 3ft (90cm) –  This is a perfect size if you have a single bed. If you are looking to upgrade your child into an adult mattress, then this is too big for them.
  • Double Mattress: 4ft 6 (135 cm) – This size mattress will fit nicely onto most standard double beds. It also comes with two pillows and two duvets. This is the perfect size if you are looking to upgrade your child into an adult mattress, but they still want their own bed for comfort.
  • King Size Mattress: 5ft (150 cm) – If you want to buy a king-size duvet and use that on your bed, this is a perfect size. It will go on nicely with no problems at all. If you are looking to upgrade your child into an adult mattress, this is too big for them.
  • Super King Mattress: 6ft (180 cm) – This size is the biggest size available and should only ever be used if you have a super king-sized bed frame. If you are looking to upgrade your child into an adult mattress, this is too big for them.
  • Emperor Size Mattress: 7ft (210 cm) – This size should only be used if you have a super king-sized frame. If you are looking to upgrade your child into an adult mattress, this is too big for them.

Choosing the right mattress

Choosing the right mattress can be tricky, especially when you are looking for something that’s comfortable and supportive. Whether you choose to go for a firm or soft mattress is entirely up to personal preference.

A double bed will give your child enough room in the day when they are doing their homework or playing with friends just as much as it can offer a cozy night sleep at night.

Choosing a new mattress for your child is an expensive but necessary investment, so if you do decide to go for a double bed it will be something you can use for years to come and that they will find comforting and supportive just as much as you do.

Tips to choose the best mattress:

  1. Ensure that you find a comfortable and supportive mattress
  2. Remember to take your budget in mind and look for value for money
  3. Go for a frame that has an attractive design and is sturdy
  4. If you live in a small flat or room, go for a standard double by measuring properly first
  5. If you like to be able to stretch out and relax, choose a mattress with sides that come up high enough
  6. Have the option of making it into two separate single beds if necessary
  7. Have plenty of storage options under or around your bed for extra space
  8. While comfort is key, make sure it has the support needed for your back and other joint problems you may have.
  9. Make sure that it’s easy to clean with a removable washable cover, so stains won’t be visible
  10. Be able to get replacement parts quickly if needed without the hassle of getting a new mattress altogether

Types of double mattresses

There are many different options available when it comes to choosing the best mattress for your child, which can range from memory foam, latex springs and even air beds.

It’s important to choose one that fits in with your budget so it will be something you feel good about investing in without breaking the bank.

I. Memory foam mattress

Memory foam mattresses are great, especially if you have back problems as this kind of material supports the body more.

It has a way of contouring to your individual shape which means that you can move around easily without feeling restricted. This is one of the best types of double mattresses available on the market today.

II. ActiGel® mattress

This is a specialised type of memory foam, which is ideal for comfort and support. It contains gel beads that are made from silicon. These work with the body to give you extra pressure relief without feeling too soft or firm under your hips.

This makes it perfect for those who have problems with their hips, spine or shoulders as it relieves pressure without putting too much strain on your joints. A mattress with ActiGel® technology is worth the investment for those who are looking to improve their joint or back problems.

III. Latex mattress

Many people like the option of choosing a latex mattress as it’s durable and reliable over time, which means it will last for years to come.

As this type of spring has its own unique feel it can be a firmer mattress or softer mattress depending on the individual, which may make it more suitable for children who are known to roll around during sleep.

This can also be a great option if you are looking for something that offers good pressure relief without being too firm under the hips.

IV. Pocket sprung mattresses

This is the standard type of mattress you will find in most stores. It consists of pocket springs that are vertically placed around an inner core, which work with your body weight to contour and give the right amount of support.

This makes it ideal for those who want a simple but durable option for their bedroom. You won’t need to make too many adjustments as it’s easy to move around on, which means it can be ideal if you like moving during sleep.

V. Air mattress

If you are looking for a mattress that also lets you adjust the firmness levels then an air bed may be worth considering. These mattresses have been popular since they first came out due to their ability to allow you to control your sleeping position and feel as if it’s adjustable.

The downside is that they do take a long time to inflate which can be frustrating if you struggle with being woken up too early.

As you can see there are many different mattress types available on the market today, some of which may work better than others depending on your budget and individual needs.

It’s important that you choose one that you will be happy with and not regret your decision later down the line.

Springs vs foam – which type of mattress is best?

When it comes to choosing the ​best mattress for your child, one of the big decisions you will need to make is whether to go for a pocket sprung mattress or a memory foam one. Both have their pros and cons which can vary depending on who you speak to.

There are many different mattress brands that offer both types of double mattresses at a variety of prices, which may make it difficult to choose one that’s right for you. It’s important that you bear in mind your budget before making a decision as well as taking into consideration the pros and cons of each type of comfort layer.

The best mattress for your sleeping position

Most of the leading brands will always recommend that you choose a mattress by your sleeping style, which means you would need to decide which one is best for you.

  • If you sleep on your back then you should consider either a pocket spring or a memory foam mattress, which will give you enough edge support under the spine.
  • If you are fond of moving around during your sleep then it’s best to choose a latex mattress as this is more durable over time. It can be harder to move around on initially but the benefits, in the long run, make it worthwhile.
  • If you like to stretch and wake up energized then an air pocket mattress might be a good option as you can adjust the firmness levels to suit your needs. This is great if you want something that will adapt to your body weight and feel comfortable when sleeping.

What is a bed-in-a-box mattress?

When you purchase a bed-in-a-box mattress, it will come compressed and vacuum-packed in order to make it easier to transport. There are some fantastic brands on the market today that offer this type of affordable mattress prices which is why they are becoming increasingly popular.

It’s also more convenient for those who don’t like the idea of having to buy a mattress in the traditional way.

The downsides are that this type doesn’t offer any kind of trial period when compared to other double mattresses, which means you won’t be able to return it if you change your mind about the purchase.

It’s also worth bearing in mind that they can take up to 15 minutes to fully expand so you will need to be patient when it comes to setting them up properly.

What is a divan double mattress?

Divan double mattresses are a style of mattress that has been constructed inside a fabric casing and placed on top of a wooden (or plastic) divan base.

Although the best quality products will be made using high-end materials such as memory foam, it is possible to find cheaper double mattresses that do not contain any kind of special filling.

What is the best mattress for back pain?

The best mattress that is suitable for anyone suffering from back pain is one of the memory foam varieties. These cushioned mattresses are perfect for those who like to sleep on their backs as they offer plenty of support under the spine, which will help to ease any discomfort you may feel.

It’s worth bearing in mind that it may take you a while to adjust when you first purchase a mattress but the benefits, in the long run, are worth it.

What is it made from?

When it comes to choosing the best mattress for you, it’s important that you take into consideration what type of materials your purchase is made from. There are many different brands offering a mattress online with a variety of comfort layers including memory foam which offers plenty of support for your body weight.

It’s also worth bearing in mind how long the mattress will last you before it needs to be replaced, which is why it’s advisable that you invest in a durable mattress.

Memory foam

Memory foam mattresses are usually made from either Visco elastic memory foam or polyurethane, with the former being more expensive than the latter.

They will always come infused with ventilation holes so that heat is not retained and this will give you a comfortable night’s sleep.


If you are looking for an affordable option then latex mattresses might be the best choice for you. They are durable yet designed to be bouncy so it’s definitely worth considering if this is your preferred sleeping positions.

You should also bear in mind that they are naturally hypoallergenic and resistant to allergens, which is why they are perfect for those who suffer from allergies.

How firm is it?

This will largely depend on the type of memory foam that is used in the construction of your mattress. Some varieties are softer than others which is why it’s important to check before you go ahead and make a purchase.

A firm mattress will be less forgiving when sleeping but this can help with support, whereas something plusher may not provide enough comfort levels. It’s worth bearing in mind that there is a huge difference between firmer mattresses and harder ones and if you like to sleep on your side then it may be more suitable for you.

Levels of firmness:

1) Soft (1-3 out of 10)

A soft mattress will provide plenty of comforts but minimal support.

2) Medium (4-6 out of 10)

A medium firm mattress will be good for those who switch between sleeping on their backs and sides.

3) Firm (7-8 out of 10)

This is the ideal option if you like to sleep on your back, as it won’t allow your body weight to sink too far into the mattress.

4) Extra-firm (9 out of 10)

This is the most popular choice when it comes to memory foam and latex, as they will support your body weight without providing much in terms of comfort.

Is the mattress waterproof?

There are many different brands on the market today that offer water-resistant covers which will prevent any liquids from reaching the inner layers of your mattress.

It’s worth bearing in mind that you should always try to remove any spills as soon as possible, even if the cover is water-resistant. This will prolong the life of your mattress and ensure it doesn’t suffer from any damage.

Do all mattresses need flipping or turning?

Most mattresses will need to be turned or flipped on a regular basis for hygiene reasons. Memory foam is usually best when it’s laid horizontally and this applies to any kind of mattress that needs rotating.

You should never share your mattress with anyone else, as this can cause bacteria to spread which you don’t want to find yourself on the receiving end of.

How long will it last?

This is an important question and depending on how you use your mattress, it may not last as long as you want it to. As a general rule, memory foam tends to deteriorate rather quickly which is why it’s advisable that you only invest in the best mattress that you can afford.

Cheap memory foam will usually need to be replaced at least every 5 years, whereas premium mattress varieties can last for up to 10 years with the right care and attention.

Does it have any warranty?

This is another important question in terms of how long your mattress will last and it varies from one manufacturer to the next. However, all reputable brands that are worth investing in will offer a warranty with your purchase, so it’s vital that you take a look at this before making a final decision.

Quality foam mattresses usually come with between 10-20 years warranty depending on the quality of the materials used to make the mattress. However, if you opt for a cheaper model then it may be worth investing in a waterproof cover as this will prolong the life of your mattress considerably, enabling you to get more value for money.

How long do they take to become fully firm?

The speed at which your mattress reaches its full size will largely depend on the density of the foam used. Cheap memory foam can take up to a few hours, whereas premium brands may only need a matter of minutes in order to reach their full size.

Be sure to read our post titled “How long do air mattresses take to inflate?” for more information on how long this takes.

What base do I need?

This is another important question and it will mainly depend on the kind of base you currently have. If you don’t have a suitable foundation to place your mattress on, then this may need to be purchased alongside your new purchase.

Wooden slats are usually the most popular option as they offer plenty of support, whereas sprung wooden bases are also worth looking into next time you need to invest in a new mattress.

Can I use it as a spare bed?

The size of your mattress will largely depend on the manufacturer and where you choose to buy from. Always check to see if the manufacturer claims that their memory foam is suitable for overnight guests as this could help save money by not having to buy an additional mattress.

All of the best air mattresses are designed for overnight guests, so check our homepage to see if this is what you require before making your purchase.

Can it be used on a sofa bed?

This will depend on the size of the sofa bed and whether or not this can accommodate your new memory foam mattress.

Always check the measurements of your sofa bed before purchasing a memory foam mattress as this will save money in the long run. We have a post titled “Can I use an airbed on my sofa bed?” which you may be interested in reading if you need further advice on this subject.

Does it have a strong chemical smell?

There is a common misconception that memory foam mattresses have a chemical smell that can be incredibly strong and this will need to be aired before you use your new purchase.

However, if the mattress has been stored in less than ideal conditions then it may need to be washed in order to get rid of these unpleasant residues and odors.

Is there a trial period?

Always check to see if there is a trial period when buying from a reputable manufacturer as this will enable you to return the mattress if it isn’t suitable.

Trial periods are usually between 30-90 days, so be sure to check these before making your purchase.

Is there a weight limit?

The weight limit of your memory foam mattress will largely depend on the materials used to make it and the density. If you weigh more than this, then it may be worth investing in a latex or spring mattress as they are designed for heavier individuals.

Care and maintenance

The level of care that you give your mattress will largely depend on the materials used to make it. Cheap memory foam mattresses will require a certain degree of care as they have been made from low-quality materials, whereas premium brands can be cleaned with ease as they are often waterproof.

Guide to caring for your mattress:

  1. Mattresses made from latex foam can be cleaned with a mixture of water, vinegar and liquid soap.
  2. Memory foam mattresses should be spot cleaned as soon as possible to avoid any stains from setting.
  3. Mattresses made from high-quality foam may be able to simply air out if they have been stored in cold conditions for more than an hour.
  4. Mattresses made from low-quality foam may require a thorough wash in order to eliminate any unpleasant odors and residues left over after manufacture.

Consumer Rights

Unfortunately, there is no legal regulation that can protect you as a consumer when purchasing a mattress. This means that the retailer has complete freedom to sell any product however they see fit and will not be held responsible for any indiscretions.

Due to this reason, it is always advisable to buy from reputable retailers who will be able to guarantee the quality of their product and provide you with after-sales support if any issues do arise.


Q. Is memory foam suitable for heavier people?

A. It is not designed to support any more weight than outlined by the manufacturer, so it is important that you read their specifications before making a purchase. Latex and spring mattresses are usually better suited for heavier individuals as they have been built using strong materials which can hold greater weights.

Q. How can I tell if a mattress has been made from low-quality memory foam?

A. Cheap mattresses are usually very firm and uncomfortable, whereas higher-end products will be much softer and more comfortable. If the mattress is too hard for you to sleep on, then it is probably made from low-density materials which is why it isn’t as comfortable as you would like.

Q. What can I do if my mattress has been stored in less than ideal conditions before it reached me?

A. If this is the case, then your memory foam may have a musty odour and look more yellow than usual. In order to remove these residues and restore the mattress to its former glory, it will need to be washed thoroughly in hot water and dried fully before use.

Q. What is the best mattress for people who sleep with a partner?

A. It can be difficult to choose a single mattress that everyone in your household will love, however, latex and foam mattresses are good choices as they offer great support and relief from pressure points. If your main priority is finding a mattress that will keep you cool during the night, then it is advised that you purchase a spring mattress with breathable materials.

Q. How can I keep my mattress clean?

A. Depending on the material used, there are many ways you can keep your mattress clean without too much effort. Memory foam made from low-quality materials can be cleaned with a mixture of water, vinegar and liquid soap, whereas the best quality mattresses should be able to just air out if they have been stored in cold conditions for a long time.

Q. Are there any additional benefits from using double mattresses?

A. Double-sized best mattresses are a great choice for couples who prefer to sleep together, as they can offer a much greater sleeping area. Double mattresses are also ideal for shifting the distribution of weight from one partner to another, which can be beneficial if you suffer from an ongoing back problem.


It’s important that you choose a mattress that is right for your budget and needs. It’s also wise to consider whether it’s the type of material that will work for you or not, as well as check what kind of warranty period it has to ensure it will last for years to come.

In the end, you should be able to get a mattress that you will love and not regret buying for a long time.

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