Best Cot Bed Mattresses: Our Best Sellers

Struggling to find the perfect cot bed mattress? Hannah Shore, our Head of Sleep Science, has helped highlight our most popular cot bed mattresses - trusted by parents for their comfort, safety, and smart design features. From breathable designs to machine-washable covers, these top picks are designed to offer the perfect balance of practicality and peace of mind.

Take a look at our most popular options and see why so many families trust these mattresses for a better night’s sleep.

1. Relyon Luxury Pocket Sprung Cot Bed Mattress

• From £159.95
• Mattress type: pocket sprung and waterproof
• Mattress depth: 10cm
• Rated firm
• Hypoallergenic

For an award-winning choice, the Luxury Pocket Sprung Cot Bed Mattress offers exceptional comfort and support. Available in two sizes, it features breathable polyester fibres around a pocket spring core, with a waterproof, wipeable, and machine-washable cover to guard against accidents.

This mattress is designed to regulate your baby’s temperature with enhanced airflow. It’s also a recognised winner, earning Gold for Best Safety Product and Silver for Best Sleep Product at the 2019 Mother and Baby Awards.

2. Relyon Classic Sprung Cot Bed Mattress

• From £119.95
• Mattress type: standard sprung and waterproof
• Mattress depth: 10cm
• Rated firm
• Hypoallergenic

The Classic Sprung Cot Bed Mattress offers firm, supportive comfort for your growing baby. It features Relyon’s baby-safe fibres for improved airflow and a sprung base to ensure lasting support.

Treated with Actipro to guard against allergens, the waterproof, wipeable, and machine-washable cover makes clean-ups simple. Unlike the pocket sprung version, this mattress comes in one size and has a standard spring core, offering great value and comfort.

3. Silentnight Healthy Growth Cosy Toddler Mattress

• From £109.95
• Mattress type: Eco Comfort
• Mattress depth: 10cm
• Rated firm
• Hypoallergenic

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

Explore our carefully selected range of cot bed mattresses, designed to support your little one’s growth, safety, and comfort from day one. Whether you’re looking for breathable materials, firm support, or easy-to-clean features, our expert-approved options make it simple to choose with confidence.