10 Best Cot Mattresses UK 2024 | Silentnight, Snüz and More

This mattress combines a pocket sprung structure with a flippable double-sided design, so it will be suitable for children from 0 all the way up to 4 years old. You'll just need to flip the mattress over once they get bigger to ensure that they get the appropriate level of support for their body. 

The polyester cover is removable, so it can be easily machine washed and thanks to the waterproof and breathable surface, your child will be protected from overheating. Plus, the anti-dust mite barrier will help to combat allergens. All of these great features make this cot mattress our top pick!

Designed for a cot or cot bed, Obaby's foam mattress is a soft yet supportive option that won't break the bank. The 10 cm depth is dent-resistant so it will last much longer than other foam mattresses on the market. 

The removable cover is machine-washable at up to 60°C, which is the ideal temperature for neutralising dust mites and other potential allergens. The foam itself is also hypoallergenic, with a breathable structure that will help to regulate your child's temperature for a comfortable night's sleep.

Silentnight is one of the most trusted brands in sleep technology, so if you want the very best for your little one then you may prefer to purchase one of their designs. This Safe Nights mattress is suitable for cot beds between 134 and 140 cm in length. 

The pocket sprung structure means this mattress will hold its shape and should last for years to come. There's a removable lambswool cover too, that can be washed as often as needed but won't irritate your baby's sensitive skin.

This award-winning mattress is comprised of coconut coir and hypoallergenic latex for premium comfort without synthetic materials or harsh chemicals. The firm side is ideal for babies aged 0 to 12 months, while the softer side can support children all the way into their toddler years. 

It's the most expensive mattress on our list, so it won't be ideal if you're shopping on a budget. However, with a 5-year guarantee and double-sided structure, you may feel that it's worth the initial investment for long-term use.

The Cuggl coil sprung mattress features steel springs for a firm structure, plus 2 layers of foam for comfort and breathability. The 10 cm depth will ensure adequate support for children of all ages, meaning it can be used for years to come.

Although the mattress is described as hypoallergenic and the machine-washable cover is incredibly convenient, the manufacturer doesn't specify which material it's made from. So, if your child has allergies to certain fibres, it may be better to choose another mattress on our list.

The SensiSpring design of Kub's mattress provides adaptive support as your child tosses and turns throughout the night. This helps to promote healthy growth, soft skin and a peaceful night's sleep, so you can snooze soundly too!

Unfortunately, it only comes in one size, so if your cot isn't between 114 x 54 and 120 x 60 cm then this mattress won't be suitable. For the right bed though, this is a budget-friendly, hypoallergenic and breathable design that will keep your little one happy and healthy while they rest.

The microfibre cover on this mattress from Baby Elegance is comprised of a polypropylene polyester blend. Not only is it durable and easy to clean, but it should feel as soft as natural fibres on your child's skin.

Unfortunately, this product is neither waterproof nor water-resistant, which is why it's so low in our ranking. To simplify cleaning, this mattress is best paired with a waterproof topper that you'll need to buy separately.

This foam mattress comes with a removable synthetic cover for easy cleaning. It's hypoallergenic and water-resistant but still breathable, so it will protect your little one from allergens as well as overheating during the night.

As this mattress is only 5 cm thick, it won't be suitable for long-term use and will not be supportive enough for older children. Considering the small size, though, it could be a great choice for younger babies or short-term use in a travel cot.