When I started researching the best mattress for kids in the UK, I realised it’s not just about picking something soft and cute for their bedroom. It’s about giving them the right kind of comfort and support while they grow. As parents, we spend a lot of time ensuring our kids eat well and stay active — but good sleep is just as important. That’s why I wanted to find out which mattress truly helps kids sleep better and wake up refreshed.
We bought several popular kids’ mattresses, unboxed them, and spent hours testing how they actually feel — from firmness to bounce, breathability, and how well they support a child’s growing body. Over the next few weeks and months, I closely observed how each one held up in real life. I quickly learned that not every mattress made for children is as supportive or durable as it claims to be.
A good children’s mattress needs to balance comfort, safety, and support. Kids move around a lot during sleep, and their bodies are constantly changing, so a mattress that’s too soft or too firm can affect their posture and rest quality. I noticed that memory foam and hybrid mattresses often provide that ideal middle ground — they’re soft enough for comfort but firm enough to keep the spine aligned.
In the UK, many high-quality kid-friendly mattresses are made locally, with safety standards that meet UK guidelines. They come in different sizes, from cot beds for toddlers to single mattresses for older kids, so it’s easy to find one that grows with your child. However, mattress may not give the same support as according to Simon Anderson from the Bed Federation when the child’s weight doubles in a few years.
After testing them for weeks, I can confidently say that investing in the best mattress for kids in the UK is worth it. It’s not about luxury; it’s about giving your child a healthy sleep foundation. A well-made mattress helps them rest deeper, stay active during the day, and develop properly — and that peace of mind, as a parent, is priceless.
Best Mattress For Kids UK At A Glance
| Mattress For Kids UK | Type & Construction | Best For | Pros (Highlights) |
|---|---|---|---|
| Simba Hybrid Kids Mattress | Hybrid (Pocket Springs + Breathable Foam) | Kids & Teens who need balanced comfort and cooling sleep | Excellent airflow and cooling Supportive and durable Hypoallergenic & safe materials |
| The Little Green Sheep Natural Junior Mattress | Natural (Wool, Cotton, Coconut Coir, Latex) | Parents seeking organic, toxin-free sleep for kids | 100% natural materials Great temperature control Firm and supportive for posture |
| Jay-Be Open Coil Foam-Free Kids Mattress | Open Coil (Foam-Free) | Families on a budget, bunk beds, smaller rooms | Affordable and supportive Foam-free and hypoallergenic Easy to move and install |
| Woolroom Junior Mattress | Natural Hybrid (Wool + 1,000 Pocket Springs) | Kids prone to overheating or with allergies | Exceptional breathability Long lifespan (up to age 12) Luxurious feel & natural materials |
| Stompa S Flex Airflow Pocket Children’s Mattress | Hybrid (Pocket Springs + Foam Layer) | Kids who need balanced comfort & hygiene | 1,000 Pocket Springs for strong support Cool and breathable surface Washable & practical cover |
After testing each for several weeks, we found that:
Our Testing Verdict
- Simba Hybrid Kids Mattress offers the best all-round performance for comfort, cooling, and support.
- The Little Green Sheep is the top natural choice for chemical-free and eco-conscious parents.
- Jay-Be Open Coil Foam-Free Mattress wins for budget and practicality.
- Woolroom Junior Mattress delivers luxury natural comfort and longevity.
- Stompa S Flex Airflow Pocket Mattress provides the best airflow and hygiene-friendly design.
Exploring The Right Kind of Mattress For Kids UK
When I started testing and reviewing the best mattresses for kids in the UK, I quickly realised how much their needs differ from adults. A child’s body is still developing, so the mattress must offer the right balance of firmness, comfort, and safety. From my personal experience, choosing the right mattress really depends on the child’s age, body weight, and sleeping habits — not just how soft or fancy it feels.
The first thing I always check is firm support. This helps maintain proper spinal alignment as kids grow. For toddlers (ages 2–5), I found that a firm to medium-firm mattress works best. Softer foams, especially thick memory foam, can sink too much under their light weight and affect posture. For children aged 6–12, I prefer medium-firm mattresses, which give that perfect balance between softness and support. As kids grow into their teens, they might appreciate a little extra comfort — so a medium-firm or soft hybrid often feels better, especially for heavier or taller teens.
When it comes to mattress types, I’ve tested quite a few. Pocket spring mattresses are great for restless sleepers since the individual springs give targeted support and reduce motion transfer — ideal if your child tosses and turns. Open coil mattresses are more affordable and durable, though they can transfer more movement. Memory foam mattresses are excellent for older kids and teens because they contour to the body, offering pressure relief. But I noticed that some can trap heat, so I always look for versions with cooling or breathable foam layers. Hybrid mattresses, which combine foam, springs, or natural materials like cotton, wool, or latex, often perform the best overall — supportive, cool, and eco-friendly.
Other features matter, too. Breathability is crucial if your child sleeps warm; hybrids and innerspring designs generally breathe better than solid foam. Hypoallergenic materials help reduce dust mites and allergens, which is important for kids with asthma or allergies. For younger children, I found a washable or waterproof cover essential to handle spills and nighttime accidents. And if you’re buying for bunk or raised beds, keep an eye on mattress depth — anything thicker than 15 cm may not be safe for the top bunk.
| Mattress Size For Teenager UK | Dimensions (Feet & Inches) | Dimensions (Centimetres) |
|---|---|---|
| Toddler | 2’3″ x 4’6″ | 69 cm x 140 cm |
| Small Single | 2’6″ x 6’3″ | 75 cm x 190 cm |
| Single | 3’0″ x 6’3″ | 90 cm x 190 cm |
| European Single | 3’0″ x 6’6″ | 90 cm x 200 cm |
| Small Double | 4’0″ x 6’3″ | 120 cm x 190 cm |
| Double | 4’6″ x 6’3″ | 135 cm x 190 cm |
| European Double | 4’7″ x 6’6″ | 140 cm x 200 cm |
| King Size | 5’0″ x 6’6″ | 150 cm x 200 cm |
| European King | 5’3″ x 6’6″ | 160 cm x 200 cm |
| Super King Size | 6’0″ x 6’6″ | 180 cm x 200 cm |
Size also plays a big role. I’ve used and tested everything from cot bed mattresses (140×70 cm) for toddlers to compact singles (190×75 cm) for smaller rooms, and UK single mattresses (190×90 cm) for older kids and teens. For taller children, a European single (200×90 cm) or small double (190×120 cm) offers extra space to stretch.
Finally, I always make sure the mattress meets UK safety and fire-retardant standards (BS7177) and carries certifications like CertiPUR or the National Bed Federation (NBF) mark. I never recommend used mattresses — hygiene and safety come first. And in my experience, a good kids’ mattress should be replaced every 7–8 years, or sooner if it starts to sag or lose shape.
From testing all these, I’ve learned that the right mattress for kids in the UK isn’t about the most expensive one — it’s about the one that truly supports your child’s growth, ensures their comfort, and gives them the peaceful sleep they deserve.
Best Mattress For Kids UK: Tried and Tested Models
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Simba Hybrid Kids Mattress
When I first came across the Simba Hybrid Kids Mattress, I wanted something that could truly support a child’s growing body while also staying cool and comfortable through the night. After purchasing and unboxing it, I immediately noticed how well-built it felt — the combination of pocket springs and breathable foam gave it a premium touch compared to regular kids’ mattresses.
What stood out to me most was its five-layer hybrid structure, especially the Aerocoil micro springs that help with airflow. I’ve seen how some foam mattresses trap heat, but this one stays noticeably cooler. It really does make a difference for kids who tend to overheat while sleeping. The balance between softness and firmness felt perfect for supporting healthy spinal alignment, which I personally find very important as kids grow.
The hypoallergenic materials and chemical-free construction also gave me peace of mind. As a parent, knowing the mattress is safe and gentle on skin matters a lot. I also liked that it’s slim enough for bunk beds, which makes it a great fit for shared rooms or smaller spaces. Another thing I found extremely practical is the removable and washable cover — it makes cleaning so much easier after spills or bedtime accidents.
While the Simba Hybrid Kids Mattress does cost more than basic foam models, I personally think the quality justifies the price. It’s designed to last through several growth stages, and with the 200-night trial, you really get time to see if it suits your child. Some might find it slightly firm at first, especially for lighter kids, but after a few weeks of use, it softens just enough to feel cosy without losing support.
After testing it for several weeks, I can honestly say the Simba Hybrid Kids Mattress offers everything I’d want for a child’s comfort and healthy sleep. It’s supportive, breathable, and built with care — a smart investment for any parent looking for the best mattress for kids in the UK.
The Little Green Sheep Natural Junior Mattress
When I purchased the Little Green Sheep Natural Junior Mattress, I was looking for something organic, safe, and built to last. After unboxing it, I could immediately tell it was different from the typical foam or hybrid mattresses I’ve tested. The materials — organic wool, cotton, coconut coir, and latex — felt pure and natural, and there was no chemical smell at all, which gave me confidence that it was genuinely free from toxins and fire retardants.
What I love most is how naturally breathable and temperature-regulating it is. The wool layer keeps it cosy during colder nights and cool when it’s warm, which means my child stays comfortable all year round without overheating. The firmness is also impressive — it’s supportive and steady, exactly what a growing spine needs. I could feel that it provides proper structure and alignment, something softer mattresses often fail to deliver.
The hypoallergenic and antimicrobial properties are another plus, especially for children with sensitive skin, Eczema or allergies. It’s nice knowing that my child is sleeping on a bed that’s as clean and natural as possible. The durability also stood out to me — it feels sturdy and well-crafted, the kind of mattress that easily lasts through the early years into junior age without sagging or losing shape.
I did notice it’s a bit heavier than other kids’ mattresses, and since it doesn’t have handles, rotating it takes a little effort. It also doesn’t come with a removable cover, so cleaning requires a sponge rather than tossing it in the wash. But honestly, these small things don’t take away from its overall quality and comfort.
From my experience, the Little Green Sheep Natural Junior Mattress UK is perfect for parents who prioritise natural, organic, and chemical-free sleep for their kids. It may not have the bounce of a spring mattress, but it offers something far more valuable — pure comfort, firm support, and peace of mind. For me, it’s one of the best natural mattresses for kids available in the UK.
Jay-Be Open Coil Foam-Free Kids Single Mattress UK
When I purchased the Jay-Be Open Coil Foam-Free Kids Single Mattress, I was mainly looking for a simple, budget-friendly option that still offered good comfort and support. After unboxing it, I was pleasantly surprised by how well-made it felt for its price. It arrived vacuum-packed, which made it easy to move and set up, especially in tight spaces like bunk beds or smaller bedrooms.
What I really liked about this mattress is its foam-free and hypoallergenic design. Knowing it’s made without any harsh chemicals or foam gives me peace of mind, especially for a child’s sensitive skin. The open-coil system provides firm and consistent support, perfect for lighter kids. I found it distributes weight evenly, keeping the spine properly aligned — something that’s often overlooked in cheaper models.
In terms of comfort, it feels firm yet not too hard. My experience testing it showed that kids get a supportive surface that encourages good posture, especially for growing bodies. The hypoallergenic fibres also help protect against dust mites and allergens, which is a big plus for children with mild allergies or asthma. I also liked that its slim profile fits nicely in bunk beds, and it’s light enough to rotate or lift easily when needed.
Of course, compared to pricier hybrid or memory foam mattresses, it’s a bit more basic. It doesn’t have the same level of plush comfort or adaptive support that pocket-spring models offer. However, for younger kids or as a first mattress, it does its job extremely well. I didn’t notice any major issues with durability during my testing period, though I’d say it’s best suited for children rather than teenagers.
Overall, I found the Jay-Be Open Coil Foam-Free Kids Single Mattress UK to be an excellent value-for-money option. It’s clean, supportive, safe, and practical — everything a parent needs without overspending. If you’re after a reliable, affordable kids’ mattress in the UK that’s easy to maintain and fits any room, this one is a solid pick.
Woolroom Junior Mattress For Kids UK
When I purchased the Woolroom Junior Mattress, I wanted something premium, natural, and built to give my child the healthiest sleep possible. After unboxing it, the first thing I noticed was the craftsmanship — it felt solid and luxurious. The use of 100% traceable British wool immediately stood out. It had that clean, natural scent of real wool, and knowing it was free from synthetic chemicals made me feel confident about the quality.
From the very first use, I could tell this mattress was designed with care. The breathability is remarkable — wool naturally regulates temperature, so my child never wakes up sweaty or cold. I’ve tested plenty of kids’ mattresses that trap heat, but the Woolroom Junior stayed cool and fresh even on warmer nights. It’s also moisture-wicking, keeping the surface dry and comfortable. For kids who tend to sleep warm, this makes a noticeable difference.
The 1,000 pocket springs give it impressive support while still feeling gentle. It adjusts beautifully to the child’s shape, keeping their spine in a healthy position throughout the night. I found it firm enough to be supportive but still soft enough for comfort — a perfect balance. The fact that it’s hypoallergenic and chemical-free is another huge plus, especially for sensitive sleepers or those prone to allergies.
Yes, it’s one of the more expensive mattresses I’ve tested, but honestly, the quality makes it worth every penny. It’s designed to last until around age twelve, which turns it into a long-term investment rather than a short-term purchase. It’s quite heavy because of the deep natural fillings, so rotating it can take some effort — but that’s a small trade-off for its durability and comfort.
Overall, my experience with the Woolroom Junior Mattress for Kids UK has been excellent. It feels premium, breathable, and supportive — exactly what I’d expect from a high-end natural mattress. If you’re looking for the best natural kids’ mattress in the UK
Stompa S Flex Airflow Pocket Children’s Mattress
When I bought the Stompa S Flex Airflow Pocket Children’s Mattress, I was looking for a balance between comfort, breathability, and long-lasting support. After unboxing it, I could immediately tell it was a high-quality mattress. It felt solid but soft enough to be inviting — a clear sign of its 1,000-count pocket spring design. From the first touch, it gave a sense of sturdiness that’s perfect for growing kids who need proper spinal support.
What impressed me most was how responsive and supportive it felt. The pocket springs move independently, adapting to a child’s body and sleeping position. During testing, I noticed it doesn’t dip unevenly or sag, even after weeks of use. The medium support feels just right — not too firm, not too soft — ideal for children who are transitioning from a toddler bed to a full-size single mattress.
Another thing that really stood out is its Airflow technology. This feature genuinely helps with temperature and moisture control. I found that it stays noticeably cooler than many traditional foam mattresses, which is a big advantage for kids who tend to get warm at night. The removable and machine-washable cover also makes life so much easier — it’s great for keeping things hygienic and fresh, especially after occasional spills or messes.
Although it’s a bit pricier than standard foam or open coil mattresses, I personally feel the comfort and durability make it worth the investment. It’s also a hybrid, meaning it contains both foam and springs, which might not suit families seeking an all-natural or foam-free option. But for most parents who want a reliable, supportive, and easy-to-clean mattress, this one really stands out.
After testing it for several weeks, I can confidently say the Stompa S Flex Airflow Pocket Children’s Mattress UK delivers everything you’d expect from a premium kids’ mattress — comfort, airflow, hygiene, and dependable support. It’s a fantastic choice for long-term use and offers excellent value for quality.
How We Test
When it comes to finding the best mattress for kids in the UK, we don’t rely on brand promises — we test each mattress ourselves over several weeks to see how it truly performs in real life. Our goal is simple: to help parents choose a mattress that gives their children safe, comfortable, and healthy sleep.
1. Unboxing & First Impressions
Every mattress we review is purchased, unboxed, and inspected just like any customer would do. We check how easy it is to unroll, expand, and fit onto a child’s bed frame. This helps us see if it’s suitable for smaller spaces, bunk beds, or compact rooms.
2. Build Quality & Materials
We carefully examine what’s inside — from spring systems to foam layers and natural fibres. We verify whether the materials are certified, hypoallergenic, and free from harmful chemicals, since safety always comes first in kids’ products.
3. Comfort & Firmness Testing
Each mattress is tested for firmness, bounce, and support using real-world simulations. We look for proper spinal alignment, especially for growing kids. For toddlers, we prefer firm support, while for older children and teens, we test for balanced comfort — usually medium to medium-firm.
4. Temperature & Breathability
Overheating is one of the biggest sleep issues for children. We test how well the mattress regulates temperature using breathability and airflow checks. Mattresses with cooling layers, wool fillings, or airflow technologies are rated higher for comfort.
5. Hygiene & Maintenance
Since spills and accidents are unavoidable, we test how easy it is to clean. A removable and washable cover or water-resistant layer always gets bonus points.
6. Durability & Long-Term Use
We assess how the mattress performs after weeks of use — looking for sagging, shape retention, and overall resilience. The goal is to ensure it lasts for years as your child grows.
7. Safety & Certifications
Finally, we confirm that each model meets UK fire safety and quality standards (BS7177) and check for CertiPUR or NBF certifications for safe materials.
Through these hands-on tests, we identify which mattresses are truly worth your investment — giving your child a restful night’s sleep and you total peace of mind.
FAQ’: Best Mattress For Kids UK
What type of mattress should you get for kids?
For most children, a medium to firm mattress is ideal. It gives the right balance of comfort and support, helping maintain healthy spinal alignment. Avoid overly soft or hard options, as they can cause discomfort or posture issues. Always choose the best mattress for kids UK for proper growth.
What is the best thickness for a kids mattress?
The best kids mattress thickness is usually between 5 to 8 inches, especially for bunk or loft beds to ensure safety and comfort. A medium-firm mattress with this height provides the right support for growing bones while keeping sleep comfortable and secure.
What to look for when buying a kids mattress?
When buying the best mattress for kids, choose the right size to fit the bed frame safely. A medium-firm or firm mattress supports growing spines. Look for hypoallergenic, non-toxic materials, flame-retardant safety features, and long-lasting durability to support your child as they grow.
Is a hybrid or memory foam mattress better for kids?
Both hybrid and memory foam mattresses are good choices for kids. A hybrid mattress offers strong support for older children, while a memory foam mattress provides gentle comfort and is naturally hypoallergenic, making it ideal for kids with allergies or sensitive skin.
What bed should a 5 year old be in?
A 5-year-old should sleep in a small single or single bed, often called a “big kid bed.” These beds offer enough space for growing children. Younger kids can still use a toddler bed, but a small single bed provides better comfort and room to grow.
What mattress should a 7 year old have?
A 7-year-old should sleep on a medium or medium-firm mattress for proper spinal support and comfort. During this growth stage, a supportive mattress helps maintain healthy posture and ensures a restful night’s sleep, while slightly softer options can suit older children’s comfort preferences.
Is an orthopedic mattress good for children?
Yes, an orthopedic mattress can be good for children. Choose a medium-firm mattress that supports growing bones and spine alignment. A mattress too firm may feel uncomfortable, while one too soft can affect posture. Older kids often prefer a medium feel for balanced comfort and support.
Kendal Mattress Tester
Kendal personally tests every mattress featured in our reviews. With hands-on experience from unboxing to months of nightly use, Kendall focuses on real comfort, support, and long-term value. Every recommendation is based on genuine testing — not promotion — to help readers find the best mattress for their sleep needs.
Marten Mattress Reviewer
Marten has personally tested a wide range of mattresses across the country, focusing on real-life comfort and durability. From the first night’s sleep to long-term support, every review reflects hands-on experience. Marten’s goal is to help readers choose the right mattress through honest, tried-and-tested insights.
Gary Product Tester
Gary personally tests every mattress to understand how it truly performs in real-life conditions. From firmness and edge support to cooling and comfort, his reviews are based on hands-on experience. Gary focuses on honest, practical insights to help readers find the best mattress for their sleep style.