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Cot & Nursery Foam Mattresses

Our selection of cot bed mattresses includes comfortable, hygienic cot bed size mattresses, measuring 70cm x 140cm, as well as continental size cot bed mattresses measuring 60cm x 120cm. Our range includes sprung and foam mattresses, with free delivery on all products and great savings.

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Nighty Night Open Coil Cot Mattress

Nighty Night Open Coil Cot Mattress

From: £89.00

Next Day Delivery

Relyon Nitghty Night Foam Cot Mattress

Nighty Night Foam Cot Mattress

From: £59.00

Next Day Delivery

Nighty Night Pocketed Cot Mattress

Nighty Night Pocketed Cot Mattress

From: £109.00

Next Day Delivery

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More on Cot Bed Mattress

What is a Cot and Nursery mattress?

Choosing a cot mattress can be a daunting task. Young babies will spend up to 50% of their time in their cots so the right mattress with adequate support and features is essential for their healthy development. Like any loving parent, you want the very best start for your baby. But with so many different baby mattresses on the market, it’s difficult to know what to look out for. The most expensive cot mattress isn’t always the best choice of mattress for your baby. It has been widely accepted by child medical experts that buying a new mattress with the right features for each new baby you have can significantly reduce the risk of Sudden Infant Death Syndrome, or SIDS. The money you might save by handing down mattresses from one child to the next simply isn’t worth the risk it poses to your precious ones. Here at Only Mattresses, we care about the health and safety of your child, so we have compiled this guide to what to look for when choosing the right baby cot mattress for your child.

A Cot mattress comes in two basic sizes to fit the equivalent sizes of cot available on the market : standard (56x118cm) or continental (60x120cm).



Buying the right size mattress for your baby’s cot is essential, not only for his or her comfort, but for their safety too. The cot mattress that you choose must fit snugly into the cot with little or no gap between the mattresses and the cot. Measure the inside dimensions of your cot before you start shopping for your baby’s mattress. Any more than one-inch space around the perimeters can pose a serious risk of your baby becoming trapped, injured or even suffocated. If you are unsure which mattress size to choose, please don’t hesitate to call one of our telephone advisers for help.



A clean, hygienic mattress is important for the health and comfort of your baby. Known, for being messy little tykes, it’s essential that babies mattresses have covers that are waterproof and either removable for washing or easy wipe clean. Many baby mattress covers are made with fabrics that help to keep your baby cool and prevent overheating. Overheating has also been identified as a contributing factor in Sudden Infant Death Syndrome. We trust Komfi Bed’s Outlast cooling covers and stock a range of their cot mattresses here.


What type of filling you choose for your baby’s cot mattress is a matter of personal preference.

Foam Mattresses are usually the cheapest option and come with a waterproof covering. These are great for those on a lower budget and are very lightweight. As long as the Foam baby mattress is 8 to 10 cm thick, this will give good support to your baby’s body during sleep. One downside to the PVC coverings on some foam mattresses though is that they can make your baby very warm and sweaty.

Sprung Baby Cot Mattresses are less common these days but some parents prefer to give their baby a coil sprung mattress. This is perfectly ok and if you have the budget, they are a good option for babies. As long as it has a washable cover and fits the cot, a spring core baby mattress is a good choice.

Natural Fibre mattresses are usually the most expensive option. A hypoallergenic natural fibre mattress (usually coconut husk , lambs wool or bamboo) which is then covered in a natural Latex waterproof cover. Natural Fibre mattresses are an ideal choice if you are concerned about your baby’s exposure to synthetic materials. Latex is naturally cooling, dust mite resistant, waterproof and antimicrobial. Perfect for looking after your little one’s needs.


If you have any questions at all or you need help choosing the right baby cot mattress for your child, then don't hesitate to call one of our friendly advisors today.

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