Mattress Buying Advice for my Baby

Until the age of two, babies spend up to 50% of their life on their cot bed mattress. For this reason, it's important to make sure that your baby's mattress is safe and supports their growth and development.

Your baby's cot bed mattress should be:

  1. The correct size for the crib
  2. Firm and supportive
  3. Waterproof and washable
  4. Breathable and hypoallergenic

In this guide, we'll focus on what to look for when choosing a baby cot bed mattress, the types of cot bed mattresses available and how to ensure the mattress correctly supports your little one.

Baby in a crib lying on a cot bed mattress
Your baby needs a firm and waterproof cot bed mattress that fits the crib snugly

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Buying a cot bed mattress: FAQs

When shopping for your baby's cot bed mattress, there are a few things you'll need to consider. From mattress size, firmness and breathability, to mattress cleaning and safety, read on to discover the answers to frequently-asked cot mattress questions.

How big should a baby cot bed mattress be?

To identify which size cot bed mattress you need, you'll need to measure the crib first. Cribs are usually built to match the dimensions of these cot bed mattress sizes:

MATTRESS SIZEIMPERIAL MEASUREMENTSMETRIC MEASUREMENTS
Standard cot bed mattress2'4" x 4'7"70cm x 140cm
Continental cot bed mattress2' x 4'60cm x 120cm

How can I make sure the cot mattress is breathable?

Cot bed mattresses include different materials to help improve breathability. For example, Relyon cot bed mattresses include breathable baby-safe fibre. These cot mattresses also include Actipro, a 100% natural treatment that guards against allergens. This helps create a cleaner, healthier sleeping surface for your little one.

What type of mattress cover is best?

We recommend a cot bed mattress that includes a washable and waterproof mattress cover. This will keep your baby's mattress clean and hygienic. The waterproofing helps prevent accidents from damaging the mattress, whilst the removable cover can be zipped off and machine-washed.

How do I clean a baby cot bed mattress?

Some cot mattresses feature removable covers which make it easier to clean. If your cot mattress doesn't have a removable cover, you'll need to regularly spot-clean the mattress to ensure a hygienic sleep surface for your baby.

Cot bed mattresses are usually wrapped in two different types of cover: fabric or PVC. Here's how to clean each type of cot mattress cover:

Removable mattress cover typeCleaning process
Fabric mattress coverVacuum regularly and wash with non-biological mild detergent
PVC mattress coverWash with warm water and disinfectant or antibacterial spray

Never dry clean your cot bed mattress as this may leave behind chemicals that could be harmful to your baby. Ensure that you never put your baby on a cot bed mattress that isn't fully dry as the moisture can increase the risk of asthma.

Can my baby sleep on a foam mattress?

Yes, a foam cot mattress can be a good option for your baby. Foam cot mattresses are durable, supportive and often hypoallergenic. They also tend to be a little cheaper than sprung mattresses, such as open coil or pocket sprung cot mattresses.

Can I use a second-hand cot mattress?

We do not recommend that you use a second-hand cot mattress for your baby. A second-hand mattress is likely to have:

  1. Experienced bacterial growth
  2. Lost its firmness
  3. Lost its shape

A worn cot bed mattress is likely to conform to your baby's shape and increase the risk of SIDS.

We strongly advise that you purchase a new cot bed mattress if you can. This will give you the peace of mind that it is of brand-new condition and quality, is fit for purpose, supports your baby correctly and ensures your baby sleeps safely.

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Best cot bed mattresses: Our best sellers

Struggling to find the perfect cot bed mattress? Our best-selling baby cot bed mattresses are sure to provide safe, sound sleep for your little one.

Relyon Luxury Pocket Sprung Cot Bed Mattress
Relyon Luxury Pocket Sprung Cot Bed Mattress
  • Mattress type: pocket sprung and waterproof
  • Mattress depth: 10cm
  • Rated firm
  • Hypoallergenic
  • From only £129.99

For an award-winning cot bed mattress, look no further than the Luxury Pocket Sprung Cot Bed Mattress. It has the Gold award for Best Safety Product and the Silver award for Best Sleep Product at the Mother and Baby Awards 2019.

This pocket sprung cot mattress provides all the support your little one needs and it even has layers of cushioning foam for added comfort. It also features baby-safe fibres which are breathable, so you can sleep peacefully knowing this mattress ensures enhanced air-flow to regulate your baby's temperature. To top it off, the Luxury Pocket Sprung is anti-allergenic and the cover is waterproof, wipeable and can be machine washed.

Relyon Classic Sprung Cot Bed Mattress
Relyon Classic Sprung Cot Bed Mattress
  • Mattress type: standard sprung and waterproof
  • Mattress depth: 10cm
  • Rated firm
  • Hypoallergenic
  • From only £94.95

For a comfy yet supportive mattress for your baby, look no further than the Classic Sprung Cot Bed Mattress. Your little one will be super supported with the firm, sprung base, which will support your baby as they grow. This cot mattress includes baby-safe fibres for better air-flow so your baby will stay comfortable as they sleep.

For your peace of mind, this mattress is treated with Actipro to protect against allergens. The cover is also waterproof, wipeable and machine washable to make dealing with accidents easier for you.

Silentnight Healthy Growth Toddler Mattress
Silentnight Healthy Growth Toddler Mattress
  • Mattress type: Eco Comfort
  • Mattress depth: 10cm
  • Rated firm
  • Hypoallergenic
  • From only £94.95

The perfect transition mattress to a bigger bed! This cot bed mattress is suitable for children aged between 18 months to 4 years, so you know your child has enough space to grow with this mattress.

It features hypoallergenic Eco Comfort Fibres™, which helps to keep the cot mattress breathable and fresh. This is because the fibres let air circulate through the mattress fillings, evaporating excess moisture to keep them at the ideal temperature. The cosy knitted cover can also be removed and machine washed, so your little one can always enjoy a fresh and clean sleep.

The Healthy Grow Toddler Mattress is also made from recycled plastics, meaning it's good for the environment too!

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We hope this guide has given you all the information you need to choose the perfect mattress for your baby. Shop our range of baby cot bed mattresses that are sure to give your little one a safe, comfy night's sleep. If you have any questions, don't hesitate to get in touch and we'll be happy to help!