These are the best cot mattresses that helped our parent testers and their baby get a good night’s sleep

The CuddleCo Lullaby hypo-allergenic bamboo cot bed mattress is a two-time Mother&Baby Awards Gold winner, featuring two sides: one soft side for cozy nights and another waterproof mattress cover layer included for easy potty training. Crafted with natural hypo-allergenic and anti-microbial properties, it creates a germ-free sleep environment, ensuring peace of mind for mums. Our mum tester Steph loved how her son took to this mattress."My son has really taken to this mattress and it's given him plenty of good nights' sleep! I feel I can put him down easier and feel more at ease knowing he's on a comfortable mattress for the night.” 

Measuring 140cm x 70cm, parent testers also loved its quality and how perfectly it fit their child’s cot beds for its perfect fit to cot beds as well as how much space it allowed for little ones to rest and grow. Mum Erin particularly loved the fit, commenting, “it fits the cot well and doesn’t have gaps around the top or bottom.”

Parents also found their tot remained comfortable all night long with this cot bed mattress, with our mum tester vicky saying how cool it kept her son. “His mattress has never felt too warm or sweaty even in 30 degree plus temperatures." She said. Parents also loved its reversible and washable cover, making maintenance a breeze.

The CuddleCo Lullaby Hypo-Allergenic Bamboo Cot Bed Mattress was awarded Gold for Best Sleep Product at the Mother&Baby Awards 2024 and 2023. Read our full CuddleCo Lullaby Hypo-Allergenic Bamboo Cot Bed Mattress review.

Designed to provide your little one with the perfect balance of comfort and support from birth to toddlerhood, this double-sided Simba Baby Cot Bed Mattress is made using Simba’s award-winning technology with eight layers of engineered comfort, ensuring your child gets the quality sleep they need each night.

On one side, a firm, flat surface provides optimal support for newborns, keeping them safe from bacteria, allergens, and chemicals. Then, at 12 months and beyond, simply flip it over for a cushioned, edge-to-edge support suitable for toddlers. This versatile design ensures your child's sleep needs are met as they grow, saving you money in the long run.

As well as loving the seamless transition between each side, our parent testers loved the convenience of the removable, washable cover, particularly if accidents happened. One mum tester said, “with it being a child’s mattress there are often times they need a thorough clean and the fact you can easily remove the cover to machine wash it is fab."

Although some parents were put off by the premium price, our parent testers found it really was worth the investment, with one of our mum testers finding her two-year old son loved this after being moved into his own room. “He has done amazingly well at settling into his own room and I do believe the mattress plays a big part in this. It is such a comfy mattress and perfect for little ones. My son used to regularly wake up but I’m beginning to question if maybe he just wasn’t as comfy on his previous mattress as he now sleeps so well.” She said.

The Simba Baby Cot Bed Mattress was awarded Bronze for Best Sleep Product at the Mother&Baby Awards 2024. Read our full Simba Baby Cot Bed Mattress review.

A firm favourite amongst mums and dads, The Little Green Sheep Natural Twist Cot Bed Mattress is crafted with four natural ingredients - Coconut Coir, Natural Latex, Wool, and Cotton - this mattress offers 100% natural comfort, free from harmful chemicals, ensuring the right support for your little one from infancy to toddlerhood.

The firm side is recommended for babies up to 12 months to provide a safe and supportive sleep surface, while the more supple side, features natural latex for more cushiony comfort as your child grows. Our mum tester Susan loved the fact it was made using natural fibres, giving her peace of mind. “Knowing that the mattress is hand made from four natural breathable materials with no harmful chemicals or toxins gives me peace of mind. The materials are also temperature regulating which ensures the baby does not get too hot.” She said.  

As well as its natural materials, mum testers also found this a very comfortable and high quality mattress, with mum tester Jamie loving the ‘try before you buy’ feature. “The mattress itself was weighty but not too heavy to pick up and move around. I also liked that the plastic cover provided a 'try before you commit' - it allowed me to double check that the mattress would fit my cot bed frame correctly and if not I would be able to return the mattress provided I did not remove the cover.” She commented. 

The main downside our mum tester Lucy would have liked is the addition of a waterproof cover. “Being made of natural materials the product information states that it is therefore very important to avoid spills or accidents getting through to the mattress and that a waterproof mattress protector should therefore be used.” She said.

Won Gold at the Mother&Baby Awards 2021 for Baby Sleep Product. Read our full The Little Green Sheep Natural Twist Cot Bed Mattress review.

Made using foam and open coil springs, this affordable yet high-quality mattress supports your baby's natural posture while ensuring breathability with hypoallergenic properties for a peaceful night's sleep.

The mattress comes with a removable washable cover, making it easy to clean in case of any accidents, and is quilted with 100% polyester filling along with the fully breathable Just-Tec fabric which enhances airflow,  to help keep your little one cool and comfortable throughout the night, while the hypoallergenic properties provide added peace of mind for parents. One parent tester found their little one remained very comfortable on this mattress, commenting; “We bought this when we moved out daughter from a cot to toddler bed and she has slept soundly every night since (about 3 weeks ago). That's really all the proof I need as she has been quite a fussy sleeper and would not sleep if she was not comfortable!”

With safety as a top priority, this mattress is suitable from birth and complies with British Standards for Safety & Performance. Measuring 10cm in height and 140cm in length, this mattress fits standard cot bed sizes perfectly. Weighing just 7kg and finished in classic white, it blends seamlessly into any nursery decor.

Designed to provide optimal support for your baby's developing head and joints, the ClevaMama Clevafoam Support Cot Mattress is made using ClevaFoam®, offering superior protection against Flat Head Syndrome, scientifically proven to reduce pressure on the head by 50% and increase support by 80%.

The mattress is breathable and lightweight with reduced heat retention, creating a comfortable sleeping environment for your little one. Its hypoallergenic and pH-balanced properties make it suitable for babies with sensitive skin or allergies. 

The removable and machine-washable cover with a reverse zip ensures easy cleaning, while the mattress is tested for harmful substances according to global criteria, meeting OEKO-TEX® STANDARD 100 standards. Suitable from birth, this mattress offers a three-year guarantee, providing long-lasting comfort and safety for your baby.

Our mum tester Melissa found her baby settled well when transitioning to this mattress. “Since using the Clevafoam mattress my baby has slept much better which makes mum life much more manageable after a full nights sleep. My baby settles quickly and seems less restless in the hot weather than he did with his previous mattress.” Melissa said. Its compact delivery box makes it convenient for parents with limited space. 

The main change our parent testers would have liked to see is the addition of a waterproof fabric or cover. Mum tester Melissa commented, “my baby has reflux so is sick quite often. I did purchase a waterproof sheet however as though it took a small part of the comfort away with the sheet being thicker than a normal sheet.”

Won Silver at the Mother&Baby Awards 2022 for Best Bedding. Read our full Clevamama Clevafoam Support Cot Bed Mattress review here.

Made using a natural lambswool support system to ensure optimal support for your baby's head and body during those crucial early years, the Silentnight Safe Nights Superior Pocket Cot Mattress is designed with a breathable mesh cover to promote airflow for a more hygienic sleeping environment, while the Purotex treatment combats moisture, mites, and allergens. 

Our real parent testers found this mattress helped their little ones to settle quickly and sleep soundly, with our mum tester Terri commenting, “It could be a coincidence but my normally bad sleeping toddler has started sleeping through the night since using this mattress!” Its compact and lightweight design makes it convenient for travel, and the removable and washable cover ensures easy cleaning after accidents.

One thing our mum testers found could have been more helpful were the care instructions, and mum tester Danielle would have liked it to be waterproof or come with a waterproof cover for simplified cleaning.

Read our full Silentnight Safe Nights Superior Pocket Cot Bed Mattress review.

With a dual-sided design and a pocket-sprung core, the SnüzSurface Duo Cot Mattress offers support as your little one transitions into toddlerhood. Simply flip over to the firmer side to accommodate their changing needs as they grow.

Designed to withstand leaks, accidents, and spills, this mattress boasts a waterproof surface, ensuring easy cleanup and maintaining a hygienic sleeping environment. The innovative 3D breathable mesh cover helps keep little ones cool in the night, while the anti-dust mite barrier provides added protection.

Suitable from birth to 4 years and compliant with safety standards, it offers longevity as well as peace of mind to parents. The removable, machine-washable cover simplifies maintenance, while the 2-year guarantee ensures its durability.

Real parent testers loved the impact it had on their child's sleep quality, although some did struggle to find a mattress cover to fit properly, with mum tester Ellie saying, “Excellent quality mattress. Breathable, firm but comfortable seeming. The only issue is, you absolutely cannot get sheets to fit this mattress unless they’re directly bought from snuz themselves.” It was also annoying that the mattress needed to rest flat for 7 days upon opening before use.

Designed with a unique hollow core and fully breathable mesh, the Purflo Cot Bed Mattress ensures optimal air circulation, providing a comfortable and safe sleep surface for your baby or child. Its suitable from birth to 4 years (or up to 25kg), conforming to your baby's body, helping prevent flat head syndrome and promoting healthy sleep patterns.

Certified as fully air-permeable, the Purflo mattress maintains a thermo-neutral environment, helping regulate your baby's temperature for a comfortable sleep experience year-round, even on those hot summer nights. Its removable and washable cover ensures optimum hygiene, preventing the build-up of dust mites and allergens, while also extending its lifespan for future use.

Hypoallergenic and featuring specialist fibre padding that is chemical and allergen-free, this is an ideal mattress for babies prone to allergies, asthma, or eczema. Real mum tester Jen loved how breathable this mattress was as well as the convenient washable design, commenting, “fully breathable so if little one decides to roll over I know they will be safe. Washable! Oh my days, a washable mattress, so very very handy for those little accidents!” As mum Jen says, unlike traditional foam mattresses, the Purflo mattress can be washed repeatedly, keeping it fresh and pristine for years to come.

Offering both luxury and practicality, the CuddleCo Comfi-Love Signature Children's Mattress is made from bamboo, a hypoallergenic surface. This mattress also responds to your child's body position, offering them comfort and support as they grow.

Our real mum testers loved the double-sided design, with a soft bamboo fabric side for infants and a waterproof training layer for older children making it nice and easy to clean during potty training and everyday use. Mum tester Hayley said, “my little girl finds the fabric side very comfortable and she sleeps really well on it.”

Hypoallergenic and breathable it provides a hygienic and comfortable sleep environment for your little one, with our mum testers finding it helped settle their babies quickly, even little ones with sensitive skin. “I love the hygienic aspect - the mattress is anti-allergenic and anti-microbial. It's breathable, meaning the mattress stays safer, and fresher for my baby.” Commented our mum tester Laura. 

Although some mums had a personal preference for a sprung mattress for added support, overall, they couldn’t find much they’d change with this mattress. Made here in the UK, parents loved the comfort and durability of this mattress, also appreciating its reasonable price point.

Read our full CuddleCo Comfi-Love Signature Mattress review.

The CuddleCo Signature hypo-allergenic bamboo pocket sprung cot bed mattress is made using bamboo fabric which boasts natural hypoallergenic and antimicrobial properties, promoting a cleaner and germ-free environment for your little one. Dual-sided, it’s designed to adapt to your child's needs as they grow, featuring a luxurious bamboo fabric on one side and a waterproof training layer on the other. 

Mum testers loved the comfort and support it offered their little ones, with our mum tester April sharing how her daughter loved this mattress. “This mattress seems really comfy, it’s really soft and springy and easy to clean. My daughter really liked it, it felt like it contoured to her shape and she looked so cosy when she was sleeping.” 

Mum and dad testers liked its compatibility with cot sizes and easy-clean properties, adding to its convenience. The only thing some parents worried about was that it was a bit too soft for babies under six months, with mum tester Alexandra saying, “ I felt confident leaving my little one on it during her day time naps (when they happen that is!) but before six months old I would worry the mattress is a tad soft."

Won Bronze at the Mother&Baby Awards 2023 for Baby Sleep Product. Read our full CuddleCo Signature hypo-allergenic bamboo pocket sprung cot bed mattress review.

If you’re looking for a sustainable and organic mattress, then the Naturalmat Quilted mattress might be just what you’re looking for. Made using organic materials, including coir, lambswool, and latex foam, it provides excellent breathability and softness while being hypoallergenic and anti-dust mite. 
Our mum tester Emma found it very comfortable for her son, commenting, “my son Olly had a great night’s sleep on this. It’s a moderately soft mattress which is really comfortable.”

The chemical-free composition, make this mattress a safe choice for your child as well the added support it offers. Parents also loved how durable it is, and liked the peace of mind the five-year guarantee gave them. It's designed to last until your child outgrows it, making it excellent value for money. 

Read our full Naturalmat Quilted Latex Matreview.

This mattress is all about giving your baby a cleaner, fresher, and healthier sleep environment. Featuring a blend of nature's finest TENCEL™ fibers and Purotex® anti-allergy protection, The Mother&Baby Gold Collection baby and toddler mattresses ensures a hygienic sleep space. This feature gave our mum tester Louise some much needed peace of mind, with her commenting, “we have a cat in our house so I love the idea that this mattress can clean cat allergens! With the usual new baby anxieties, I’m so keen on making sure my little one’s environment is as natural and clean as possible.”

The Purotex technology found in this White Gold Anti-allergy Pocket Sprung Mattress is proven to reduce house dust mite allergens by 93.7%, cat hair allergens by 92.8%, and dog hair allergens by 66.7%. The inclusion of Tencel natural fibers enhances breathability and temperature control for added comfort. One dad found it really helped his daughter to get back off to sleep after feeding. “We bought this as we were worried or 6 month old was waking due to not being as comfortable as she could be. Now she sleeps right through most nights and straight back to sleep when she does wake for a night feed.” He said. 

This mattress features individual adaptable pocket springs for tailored support for your little one, is suitable for cots, and comes with a waterproof membrane. You’ll be pleased to know all covers are removable and washable, ensuring easy maintenance and long-lasting freshness.

Suitable from birth, this hypoallergenic mattress from Obaby is designed to support your baby's muscle development and bone growth, thanks to its firm yet resilient design. Made with coconut coir bonded with natural latex, it offers a naturally bouncy and soft feel, promoting a comfortable sleep environment for your little one. Parents loved the level of comfort this mattress gave their babies, with one mum tester commenting, “although there are pocket springs in it the mattress is also surrounded by foam so it seems nice and comfy but has that spring and bounce you get with pocket springs to give our daughter that support.” 

As your baby grows, this mattress adapts to their body with a reversible design. One side features individual pocket springs encased in high-grade, dent-resistant nursery foam, offering increased support for your tot's back, neck, and head, aiding their posture and helping them drift off in the process. The other side has a Tencel fabric top panel, helping keep them cool in the night, while the polyurethane panel underneath provides waterproof protection against little accidents. Parents found this mattress to be great at keeping their little ones cool, one parent tester commented, “If she naps on my bed, her whole back is wet, but on this matress-never.” 

This mattress is also very easy to keep clean with its removable and washable covers, including a water-resistant inner cover that can be used as a sleeping surface while the outer cover is being cleaned. Available in two different sizes to fit Obaby's range of cots, cot beds, and mini cot beds, this dual-core mattress is a reliable choice for parents.