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Best Cot Bed Mattress 2021

Last Updated: July 5, 2021

If you consider the amount of time babies and toddlers spend sleeping, selecting the best cot bed mattress for your child needs thorough research and consideration to be done. With newborns to 12-month-olds sleeping between 13 and 16 hours per day, the right mattress can encourage a night of good sleep.

With cot bed mattresses safety should be the most important factor. Please read the most important aspects regarding cot mattress safety and considerations at the end of our top picks for additional safety tips.

Also don't forget to get check out our Top Duvets for Toddlers if you are looking for one.

Here is our list of the Best Cot Bed Mattresses you can buy in the UK right now (Important Considerations in Conclusion).

EveEve BabyHybrid30 Nights
5 Years
PandaKids BambooMemory Foam30 Nights
5 Years
EmmaCot MattressFoam Combination45 Night
5 Years
John LewisDual-Purpose Pocket SpringHybridNA
5 Years
The Little Green SheepNatural TwistNaturalNA
5 Years
SilentnightSafe Nights AirflowFibreNA
3 Years
Prices are referring to the cot bed mattress 140 x 70 cm size and information may be subject to change. Please check with the brand/manufacturer before purchasing.

1. Eve Baby Mattress

Up to 35% OFF
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20% off Premium Mattresses | 30% off Original Mattresses | 35% off Lighter Mattresses |...Show More
20% off Premium Mattresses | 30% off Original Mattresses | 35% off Lighter Mattresses | 20% off Bed Frames | 20% off toppers | 20% off cot mattresses | 20% off linen bamboo T&Cs apply. Show Less
cot bed mattress eve baby mattress
(Image credit: Eve)

This year's Best Cot bed Mattress winner is the Eve Baby mattress. It has also received awards from Junior Design and the Baby Products Association (BPA). With excellent reviews left behind by customers, we had to have a closer look.

Eve Baby Mattress Construction

The cover is made from 100% polyester with silver ions that contain antibacterial properties which is a natural treatment. What we particularly like about the cover is that it's not only designed well (cloud-shaped patterns) but it is also machine washable at up to 60℃.

This is what we would call a hybrid mattress as it includes a core spring pocket layer to provide support. These springs are encased by foam to provide a comforting feeling and then finally it is all wrapped up in a waterproof protector to keep liquids and bed bugs at bay.

The Eve Baby mattress meets all legal UK safety and regulatory requirements as well as the British nursery foam standards. Foams used are Certi-PUR certified which means no harmful chemicals were used in the manufacturing. This cot bed mattress also complies with BS 1877-10:2011+A1:2012 and BS 7177-2008+A1:2011 standards.


  • Baby cot mattress - 60 x 120 cm
  • Cot bed mattress - 70 x 140 cm

Eve Extras

The Eve Baby mattress is delivered free of charge and comes with a 30-night trial, if you are not satisfied within that time frame you can send it back at zero cost to you. To ensure confidence in the long run Eve has also included a 5-year guarantee.

2. Panda Kids Bamboo Mattress

Up to 30% OFF
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panda kids cot mattress uk
(Image credit: Panda)

Panda is in the bamboo business with almost all their products having included some part sourced from bamboo because of its benefits. This cot bed mattress from Panda is suitable for newborns all the way up to 5 years of age.

Panda Kids Mattress Construction

The cover made from bamboo is highly breathable and by using nanotechnology is made to be waterproof. Additionally, Panda included anti-slip micro-silicone grips at the bottom to keep the mattress securely in place. The cover is removable and machine washable for practicality.

The core is a slip between an upper gel-infused memory foam to prevent overheating and a lower supportive airflow foam to ventilate the mattress appropriately and balance out weight evenly.

All products adhere to the Oeko-Tex Standard 100. Which means the Panda kids mattress has been tested to ensure they are safe for babies and sleepers who suffer from sensitive skin.


  • Panda Cot mattress 120 x 60 cm
  • Panda Cot Bed mattress 140 x 70 cm

Panda Extras

This Panda kids mattress has well over 1,000 positive reviews which show how well it is received. Similarly like the Eve baby mattress the Panda also has free deliveries and returns, 30-night trial and a 5-year guarantee.

3. Emma Cot Mattress

emma cot mattress
(Image credit: Emma)

The Emma Cot mattress is currently no longer available.

Emma is a leading sleep company in the UK and has received very strong reviews of their original mattress. Now, they enter the cot mattress category, with the Emma Cot Mattress. Still remaining focused on superior quality, Emma has packed their cot mattress with the best materials and sleep technologies available to them. Above the materials and technologies, the Emma Cot Mattress is fully certified under UK law. This means that they have been stringently testing the mattress even to the point of ensuring that no pieces can break off and become a choking hazard.

Emma Cot Mattress Construction

The first of the layers in the Emma Cot Mattress is the inner waterproof layer. This layer absorbs any liquids or moisture and prevents it from reaching the firm foam core in the centre of the mattress. This layer, thanks to its design, prevents harmful bacteria from building up as well. At the core of the Emma Cot Mattress, we find a durable polyfoam layer. The structure of the core foam layer is an open-pore design. This promotes airflow and prevents your child from overheating by allowing hot air to escape away from your toddler. 

The 100% lyocell cover is completely removable and washable up to 40 degrees Celcius. Emma has even made the effort to hide the zipper in a small pocket in the cover, to prevent your baby from harming themselves. Lyocell is more sustainable than viscose according to the current consensus in the industry. The added benefit of Lyocell is that it is accommodating to sensitive baby skin.


  • Emma Cot Mattress 60 x 120 x 10 cm
  • Emma Cot Bed Mattress 70 x 140 x 10 cm

Emma Extras

The Emma Cot Mattress is full of quality materials and is well put together. This will come as no surprise that it includes a 45-night trial, which allows your baby to get used to the new mattress. Emma also offers hassle-free returns within the trial period, should your baby not gel with the Emma Cot Mattress. The Emma Cot Mattress also comes with a 5-year guarantee, which speaks to the build quality. Basically, your baby will outgrow the Emma Cot Mattress before the bed gives you faults after 5 years of use.

4. John Lewis Dual-Purpose Pocket Spring Cotbed Mattress

Up to 20% OFF
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dual purpose cotbed mattress
(Image credit: John Lewis & Partners)

This dual-purpose cot bed is engineered to grow with your baby. The cleverly designed mattress has two sides, a firmer side for newborns and a softer side for toddlers.

Dual Purpose Cotbed Mattress Construction

The cover is fully removable and machine washable made from polyester. The cover provides a soft and breathable sleep surface. It is also treated with anti-allergy Purotex, making the mattress ideal for allergy sufferers.

The core of the mattress is made from two sets of pocket springs (one per side) with a total count of 440 springs. The springs are encased in baby-safe nursery grade foam to keep the mattress comfortable. Finally a waterproof layer on top just below the cover.


Dual purpose cot bed - 140 x 70cm

John Lewis Extras

Deliveries from John Lewis are free for orders over £50 and the mattress also comes with a 5-year guarantee.

4. The Little Green Sheep Natural Twist Cotbed Mattress

Up to 20% OFF
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John Lewis Discount Voucher Code
Visit John Lewis and Partners for the latest sales!! | T&Cs apply.
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the little green sheep natural cotbed mattress
(Image credit: John Lewis & Partners)

Another dual-sided cot bed mattress from The Little Green Sheep. This is a 100% natural mattress with a firm side (for newborns until 12 months) and a natural latex side.

The Little Green Sheep Cotbed Mattress Construction

This Little Green Sheep mattress is handmade using 4 natural materials/ingredients. Breathable cotton, supportive coconut fibres acting and mini springs producing pressure-relieving benefits. Natural latex from the Hevea tree and is binding the coconut layer. Finally, naturally hypo-allergenic fleece wool used to disperse moisture and create a fresh and anti-dust mite climate.

The Little Green Sheep Twist mattress has been designed to be so natural that your child sleeps in a pure and healthy environment, free from toxins, harmful chemicals, chemical fire retardant sprays or adhesives. This cot bed mattress passes BS 7177 and BS16890.

We will need to state that it is not waterproof and would recommend a mattress protector.


  • Little Green Sheep cot bed mattress - 140 x 70cm

Little Green Sheep Extras

Finally, it is shipped with free delivery and includes a 5-year guarantee.

5. Silentnight Safe Nights Airflow Cot Mattress

Latest Discount
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silentnight safe nights cot mattress
(Image credit: Silentnight)

Silentnight have been in the sleep product industry for over 70 years. The Silentnight Safe Nights Airflow Cot Mattress is designed to allow breathability for a cooler night's sleep.

Silentnight Airflow Mattress Construction

The soft-knitted removable and washable cover includes a 3D mesh cover to promote free airflow. This cover is treated by Purotex (100% natural treatment) and is also hypoallergenic meaning it is very unlikely to cause any allergic reaction.

This cot bed mattress is free from foam which removes any odours they may bring. The core is rather made from Silentnight's sustainable Eco Comfort Fibre™ layers which is also very breathable.


  • Silentnight Airflow cot mattress - 120 x 60 cm
  • Silentnight Airflow cot bed mattress - 140 x 70 cm

Silentnight Extras

Deliveries are free within the UK.

Cot Mattress Safety

  • We recommend buying a new cot mattress for your baby/ toddler to prevent any instances of hygiene-related issues.
  • Mattresses tend to come in two sizes in the UK. A baby mattress for a cot 60 x 120 cm and cot bed mattress 140 x 70 cm in size. The cot and cot bed mattress should fit the cot used. A cot is suitable for newborns up to 2 years of age and a cot bed (which can be converted into a bed for toddlers once your child outgrows the cot) is suitable for babies from birth to 4 years of age.
  • Choose a mattress that is slightly firmer rather than soft to ensure your baby is supported. The rule of thumb is that the cot bed mattress should not be thinner than 8cm.
  • Finally, make sure the cot bed mattress includes BSI number BS 1877-10:2011+A1:2012. Even better if they also carry BS 7177:1996 and BS EN 16890:2017. These are standards that ensure the cot bed mattress you are buying is in line with British Standards with respect to safety. Find out more here.

Cot Bed Mattress Considerations

Below we take you through a few explanations as well as some vital considerations to be taken into account before making your decision.

Types of Cot Bed Mattresses

These are the most common types of cot bed mattresses found in the UK.

Foam Cot bed Mattresses

Typically made from polyurethane foam or also known as polyfoam. These cot bed mattresses tend to be the in the firmness rating of about medium firm all the way up to firm, as firm cot bed mattresses are regarded as safest for babies. The support offered by these cot bed mattresses depends on the thickness of the whole mattress as well as the density of the foam used (kg/m3) the higher the more supportive.

  • Foam cot bed mattresses are generally the most affordable.
  • Cot bed mattresses which are foam layered generate almost no noise when bearing weight and movement.
  • Foam mattresses are associated with above-average off-gassing.
  • Generally, foam cot bed mattresses have less edge support as compared to hybrid and pocket sprung mattresses.

Pocket Sprung & Hybrid Cot bed Mattresses

These cot bed mattresses include a pocket sprung layer generally used as a support function with upper foam layers to provide comfort. These types of cot bed mattresses tend to be heavier in weight and have longer life spans. Most hybrid and pocket sprung cot bed mattresses offer great support and firmness to reduce rollover.

  • Pocket sprung cot bed mattresses are generally heavier with above-average life spans.
  • Can be more expensive as opposed to foam only baby mattresses.
  • Have read some reviews saying that the springs can make some squeaks.
  • Pocket sprung cot bed mattresses tend to produce less off-gassing.

Cot Bed Mattress Size

It is important to make sure the mattress you are buying for your toddler fits perfectly into the cot or cot bed you have at home. It is important to make sure there is little to no space on the sides. That way babies cannot get stuck and trapped.

The most common type of cot bed mattress size is 140 x 70 cm. Please do make sure what size cot you have so you know what size mattress will snuggly fit in.

Support & Firmness

SIDS or "cot deaths" are very rare and the risk your baby dying from it is low. However, it is something to be made aware of. This usually occurs while they are asleep and the risk can be reduced by making sure to place your baby on their back when they sleep. Important is to use a slightly firmer mattress with great support to reduce rollover.

Best Cot Bed Mattress Conclusion

We will have regarded this post to be a success if we have informed you as a parent about a safety point that you may not have heard or thought of. Please do also conduct your own research on cot bed mattresses that way you can have a more well-rounded opinion.


This site’s core purpose is to create the decision-making method quicker and cost-effective for you in regards to mattresses and bedroom accessories, here in the UK.

The reviews and views here are a collection from different sources we collect across the internet.
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