A baby's bare feet shown on top of the Natural Bamboo Cot Bed Mattress | A Guide to Finding the Perfect Cot Bed Mattress - Clair de Lune UK

A Guide to Finding the Perfect Cot Bed Mattress


For Your Little One

Choosing the best cot bed mattress for your newborn is one of the most important decisions you’ll make as a parent. A safe, supportive, and breathable mattress helps your baby sleep soundly while promoting healthy development. In this guide, we’ll explore hypoallergenic, organic, and pocket sprung baby mattresses, so you can find the perfect fit for your little one.

Important Features to Look For

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When shopping for a cot bed mattress, there are several factors to keep in mind. Here's what you need to know:

1. The Fit:
A well-fitting mattress is crucial for safety. The mattress should fit snugly in the cot, leaving no more than a 2 cm gap between the mattress and the sides of the cot. This prevents your baby from getting trapped or suffocating.

2. The Firmness:
Firmness is key in a baby mattress. A firm mattress provides the support needed for healthy bone development and reduces the risk of suffocation. You can test the firmness by pressing on the mattress's centre and edges; it should spring back quickly!

3. The Depth:
The recommended depth for a cot bed mattress is between 8-10 cm. This thickness ensures the mattress provides enough support without compromising on safety.

4. Breathability:
Babies can overheat quickly, so a mattress that allows air to circulate is vital. Look for mattresses with breathable materials or special ventilation features to keep your baby cool and comfortable.

5. Materials:
Choose mattresses made from hypoallergenic and non-toxic materials. Natural materials like cotton, wool, or bamboo are great for reducing allergens and ensuring a healthier sleep environment.

Types of Cot Bed Mattresses

Baby standing on the cot bed mattress in the Oak Cot Bed in a Scandi Natural Nursery Room | Cots, Cot Beds, Toddler & Kid Beds | Nursery Furniture - Clair de Lune UK

With so many options available, it's essential to understand the differences between the types of cot bed mattresses. Here are the most common types:

1. Foam Mattresses:
Foam mattresses are lightweight and usually more affordable. They offer good support but may not be as durable as other types. Look for high-density foam for better longevity.

2. Pocket Sprung Mattresses:
These mattresses contain individual springs enclosed in their own pockets. They provide excellent support and contour to your baby's body, promoting proper spinal alignment.

3. Dual Sided Mattresses:
Ideal for growing babies, dual-sided mattresses offer different levels of firmness on each side. One side is firmer for infants, and the other is softer for toddlers.

4. Organic Mattresses:
Made from natural materials like organic cotton or wool, these mattresses are free from chemicals and synthetic materials. They're a fantastic option for parents looking for an eco-friendly choice.


Mattress Type Best For Key Benefits
Foam Budget-conscious parents Lightweight, supportive, affordable
Pocket Sprung
Proper spinal support Contours to baby’s body, durable
Dual-Sided Growing babies Infant firm side, toddler softer side
Organic Eco-conscious parents Natural materials, hypoallergenic

Our Favourite Mattresses

Here at Clair de Lune, we've curated a selection of high-quality cot bed mattresses to suit various needs and preferences. Here are some of our top picks:

1. Clair de Lune Premium Bamboo Pocket Sprung Cot Bed Mattress

This mattress combines the natural breathability of bamboo with the support of pocket springs, offering a perfect balance of comfort and durability.

2. Clair de Lune 3D Mesh Reversible Pocket Sprung Foam Cot Bed Mattress

Featuring a breathable 3D mesh and a reversible design, this mattress ensures optimal airflow for all seasons and extended usability.

3. Clair de Lune Essentials Hypoallergenic Fibre Cot Bed Mattress

Ideal for sensitive babies, this hypoallergenic mattress provides a soft and supportive sleep surface. A budget-friendly option..

How to Care for Your Mattress

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Taking good care of your cot bed mattress will prolong its life and keep it safe and hygienic for your baby. Here are some tips:

  • Regular Cleaning: Wipe the mattress with a damp cloth and mild detergent. Avoid soaking it with water.
  • Use a Mattress Protector: A waterproof mattress protector helps keep the mattress clean and dry.
  • Rotate Regularly: Rotate the mattress from head to foot regularly to prevent sagging and ensure even wear.
  • Air It Out: Occasionally airing the mattress out can help reduce odours and keep it fresh.

In conclusion, choosing the right cot bed mattress involves considering various factors such as fit, firmness, depth, breathability, and materials. By selecting a mattress from our carefully curated range, you can ensure your little one enjoys safe and comfortable sleep every night. Happy shopping!

FAQs: Cot Bed Mattresses

1. When should I switch from crib to cot bed?

Typically around 4–6 months, when your baby outgrows the crib or Moses basket.

2. How firm should a cot mattress be?

The mattress should be firm enough to support your baby’s spine while reducing suffocation risk. Press the centre – it should spring back quickly.

3. Are organic mattresses worth it?

Yes! Organic mattresses reduce exposure to chemicals and allergens while offering a breathable, eco-friendly sleep surface.

5. Do I need a mattress protector?

Absolutely – it keeps your mattress hygienic, waterproof, and extends its lifespan.

Author: Chloé - Product Specialist & Mum of 2

Chloé is a product specialist at Clair de Lune, passionate about helping families find beautiful, practical, and safe products for their little ones. As a mum of two, she knows first-hand what works in a busy family home and loves sharing tips, advice, and inspiration to make parenting a little easier.

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