Skip to content

Best Cot Bed Mattress for Baby Size 140 x 70

baby sleeping on cot mattress

When it comes to children, all parents want is for them to get a good night’s rest in an environment that is both soothing and secure. The right mattress can make all the difference to how your baby sleeps – or not. Because not every cot bed mattress delivers on its promises.

Your baby will (ideally) do a lot of peaceful sleeping early on, and will spend a lot of time in their cot, unsupervised. That’s why it’s so important to invest in a safe, comfortable mattress and a good baby monitor

It may be tempting to go for the softest mattress, but you want a mattress with some firmness to avoid sinking, even though babies are low in weight. 

You want something that’s good for your little one’s back, keeping them comfortably cool and safe – so a surface that’s neither too stiff nor too soft. 

Since tots spend a great deal of time in their pram, stroller, buggy, crib, and cot, it is essential that these items be of high quality, which means non-harmful, hygienic, and comfortable construction is a must.

Top 3 Most Popular Baby Mattresses

We combed through numerous test reports, read customer reviews, and analysed the most popular mattresses, to shortlist the top three mattresses sized 140 x 70 that are available to buy for your baby online, today. 

Mamas & Papas Premium Dual Core Cotbed Mattress (140x70x10cm)

MAMAS and PAPAS Premium baby mattress

Mamas & Papas has been around for nearly 40 years, assisting countless parents as they bring new life into the world. Everything they do, from their multiple-award-winning baby products to the expert guidance they offer, is aimed at easing the burden of parenting. 

This trusted baby brand knows a thing or two about the needs of babies – and parents – when it comes to sleeping, safe and sound. 

About 13 months of your baby’s first two years will be spent sleeping. That may sound like a lot, but it’s necessary for their brain and nervous system to grow and develop. It’s safe to say that sleep is crucial to your baby’s health, and Mamas and Papas put the foundation of restful sleep in a high-quality mattress. 

You can rest assured that your newborn will enjoy a good night’s sleep on this Premium cot mattress with polyester comfort padding, which has been rigorously tested to stringent British standards.

Here are some of the features of this 140 x 70 Mamas & Papas Cot Mattress

  • Two-sided support is provided by the dual-core design: one for infants and one for toddlers.
  • Engineered to maintain a comfortable temperature and prevent condensation, the baby’s clothing will remain dry and comfortable all night.
  • The core is shielded from spills by the wipe-clean interior.
  • Walls that are resistant to crushing offer increased security and stability.
  • The breathable fibre inside helps keep the infant comfortable.
  • The cover is removable and washable, making maintenance a breeze.
  • Baby’s sensitive skin is protected by the hypoallergenic cover.
  • The water-repellent fabric shields you from the occasional mishap.
  • Designed and manufactured in the United Kingdom
  • The increased number of 264 micro pocket springs allows for more uniform support.
  • Allergens and dust mites can be effectively treated using Purotex Technology’s probiotic active therapy.
  • Fabrics treated with an anti-allergy agent resist microbial growth.

Silver Cross TrueFit Classic Baby Cot Mattress

Silver Cross Spring cot bed mattress

The Silver Cross TrueFit Classic Mattress is an excellent choice for a comfortable night’s sleep. This two-sided quilted cot mattress provides superior comfort for your infant from the very first night at home until they are walking.

The Silver Cross TrueFit Mattress design is made from the highest quality natural, breathable materials and has specially formed square corners to provide the best edge-to-edge fit, ensuring your baby sleeps soundly and safely during the night.

The Silver Cross TrueFit collection includes the Classic Mattress, which is distinguished by its specially designed square corners that snuggly fit around the perimeter of the cot, leaving as little space as possible for curious tiny fingers to poke through.

The TrueFit Classic Baby Mattress is made from hypoallergenic, breathable materials to provide your child with the healthiest and most comfortable sleep possible. A total of 190 unique pocket springs go into the high-quality construction, giving you the adaptable, pinpoint support you need for a restful night’s sleep, just as sleep specialists recommend.

The TrueFit Classic Mattress is reversible and water-resistant, making it perfect for infants and toddlers of all ages.

Every Silver Cross cot easily converts to a toddler bed, so you can keep using the same mattress for as long as your child needs a safe and comfortable place to sleep.

The cover can be unzipped from the mattress in a jiffy, and washing it at 60 degrees Celsius couldn’t be simpler.

It’s a quality mattress made in the UK from CMHR Nursery Grade Materials, with a machine washable cover at temperatures of 60°C. And you may rest easy knowing your child’s mattress has passed the strictest upholstery safety criteria.

NightComfort Extra Breathable Baby/Toddler Cot Bed Mattress

Breathable Baby Toddler Cot Bed Mattress

This is a budget-friendly cot mattress by NightComfort. It’s a very popular, low-cost, universally sized cot mattress that can be used in any standard bed or cot – choose from various sizes (140 x 70 x 5, 140 x 70 x 7.5, 140 x 70 x 10, 140 x 70 x 13, 120 x 60 x 5, 120 x 60 x 7.5, 120 x 60 x 10, 120 x 60 x 13cm) to find the perfect fit.

It’s the ideal complement to your baby’s all-natural resting environment and is designed to: keep your baby comfortable and safe, preventing overheating, and providing extra warmth when needed.

Made of high-thread breathable microfibre and filled with fine yarn hollow fibres, it provides a cool, comfortable sleep all night long. Further, the hypoallergenic materials are ideal for reducing allergens and skin irritations, due to the anti-allergenic treatment of the fabric and fibre.

Comes with a machine-washable cover that can be run at 40 degrees and dried on a low heat setting in the tumble dryer. Made in Great Britain, this super comfortable and supportive mattress is cleanable, hypoallergenic, fireproof, and tear-proof material used for the mattress cover.

Lightweight, low-noise polymeric polyurethane is used to make these mattresses. In terms of manufacturing, comfort foam and cold foam differ from one another. Heat-generated comfort foam is thought to be incredibly breathable but just slightly soft. 

Conversely, the cold foam created during the cold process is harder and hence more point-elastic. Mattresses made of cold foam provide superior spinal support while yet allowing for enough body cooling while you sleep.

Checklist: What Should You Look For When Buying a Baby Mattress?

Baby in crib 140 x 70

In order to pick the best mattress for your baby, consider the following criteria:

Mattress Size

A 60 x 120 cm baby mattress is adequate for the first two years of life before being replaced with a larger one. A regular children’s mattress of 70 x 140 cm lasts longer and does not need to be replaced until the child is roughly 3 years old. Mattresses for extra beds, travel cribs, and cradles may require lower dimensions, but these are also available in stores.

Mattress Firmness

A medium-hard mattress is advised for newborns and children; it should be firm but not so soft that the children sink into it. Baby mattresses, in particular, should have passed the ball test, which means that when the baby turns onto its stomach, its face should not sink so far in that it risks suffocating. Baby mattresses that meet British safety regulations for baby mattresses (BSEN716)


Should it be a coconut or foam infant mattress? Which material is best is a matter of personal preference as well as cost. Foam mattresses are less expensive and more adjustable, whereas coir mattresses provide more stability and air permeability.

Air circulation: A good children’s mattress has air chambers and ventilation channels in the mattress core to improve the sleeping environment. Your infant will sweat less while sleeping this way.

Mattress Protector

The mattress in a baby bed is subjected to a variety of stains. It would be much great if it could be removed and machine washed. Cotton covers are preferable since they are more breathable and provide a more comfortable sleeping environment for the youngster. Some mattress covers provide built-in moisture protection, making an underlay unnecessary.

Which firmness level is ideal for a mattress for newborns, Babies, and toddlers?

In contrast to adults, the degree of hardness does not play a significant role in baby and children’s mattresses. This is also due to the fact that there is no consistent standard for this, and manufacturers either do not specify any firmness at all or set it based on their own standards.

It is critical that the infant mattress is neither too soft nor too rigid so that your baby is comfortable without sinking into it. Experts indicate that a sinking depth of 3 to 4 cm is still appropriate.

It is advised to purchase a cot mattress with a firmness that adjusts to the child’s body shape when lying down and supports the spine.

How old does a baby mattress need to be?

You can’t go wrong with a baby bed measuring 60 x 120 cm in the beginning. This size is appropriate for newborns and toddlers up to roughly 2 years old.

We recommend replacing the infant bed and thus the mattress to a size of 70 x 140 cm or greater, depending on the child’s specific size.

Many parents begin with a size 70 x 140 cm so they do not have to change the bed as frequently. To pick the best children’s mattress, utilise the age-appropriate mattress size suggestions below:

From 0 to 3 Years

We recommend a 60 x 120 cm mattress or a smaller supplementary bed for babies in their first year. However, 70 x 140 cm has become the typical size for children’s beds. For small children aged 3 to 4 years, a cot and mattress measuring 70 x 140 cm are usually adequate.

Kids 4 to 6 Years old

A 70 x 140 cm children’s mattress quickly becomes too tiny for preschool children, who endure a significant development spurt at this time. There is an intermediate size of 70 x 160 cm at this age, or you can choose a youth bed with the regular size of 90 x 200 cm, into which your child can develop. As a result, you can select from the standard variety of mattresses available here.

Of course, not all newborns are the same size or weight, so you may need to perform some measuring to ensure that the mattress is the proper size.

What quality a child’s mattress should have for their age cannot be stated in broad strokes. Reversible mattresses with a baby and toddler side are available from some manufacturers.

What is the best material for a children’s mattress?

Mattresses for babies and toddlers are created from a variety of materials, each with its own set of pros and disadvantages. On the market are the following baby mattresses:

Children’s foam mattresses: The majority of mattresses for children’s and baby beds are now composed of polyurethane cold foam (PUR). The mattress core is frequently composed of numerous layers that are coupled with additional materials that respond better to body heat.

Air chambers and air channels increase air circulation, and the sleeping environment, and occasionally even pledge to reduce the incidence of sudden newborn mortality. The ability of baby mattresses to do this has yet to be verified in a test.

Cold foam mattresses are lightweight and versatile, making them ideal for your child’s initial years of life when he or she is rapidly growing.

Coconut baby mattresses: Because coconut fibres are firm and permeable to the air, they are an excellent material for infant mattresses.

Coconut is typically fixed with latex, with the latex side being more flexible and more suited for little children, while the harder coconut side is preferred for babies because it does not sink in as deeply. Prolana latex-coconut children’s mattresses are thin and hefty, with vertical ventilation channels.

Cotton fleece baby mattresses

Mattresses with a fleece core have the advantage of being soft and washable. The drawback is that they quickly distort, stiffen, and, most importantly, fail the ball test.

Spring core mattresses or mattresses with special lying zones are not required for baby beds because newborns are still so light that they would hardly benefit from it.