The Best Cot Bed Spring Mattress overall is the John Lewis & Partners Cot Bed Spring Mattress, offering reliable support and durability. For a budget-friendly alternative, the IKEA KRUMMELUR combines affordability with solid construction.
Choosing the right cot bed spring mattress is essential for your child’s safety and comfort. We compared top models based on spring type, firmness, safety certifications like BS 7177 and OEKO-TEX, and aggregated owner reviews to help you make an informed decision.
Our rankings consider factors such as edge support, breathability, and durability, ensuring a restful sleep for your little one. We’ve focused on mattresses that comply with UK safety standards and offer good value for long-term use.
John Lewis & Partners Cot Bed Spring Mattress
This mattress features 150 pocket springs for zoned support and a breathable cotton cover. It's firm enough for infants yet comfortable for toddlers. Owner reviews highlight its excellent edge support and durability.
Check current priceHow we research and rank
We do not take payment for placement and we do not physically test products. Rankings come from manufacturer specifications, material certifications (CertiPUR-US foam, OEKO-TEX textiles), and the weight of aggregated verified owner reviews, analyzed for durability, heat retention and sagging. The scores in this guide are MattressVetted editorial research ratings — our assessment of the available evidence, not customer star averages. See how we rate.
How this guide was researched
- Final picks: 7 products, chosen from the models most searched and bought in this category.
- Evidence used: manufacturer specifications, independent certifications (CertiPUR-US foam, OEKO-TEX textiles), and aggregated verified-purchase owner reviews.
- Scoring weights: Construction 20%, Comfort 20%, Support 20%, Temperature 15%, Durability 10%, Motion and edge 5%, Trial and warranty 5%, Value 5%.
- Testing: we do not physically test products. Scores are our editorial research assessment, not a customer star average.
- Research reflects: July 2026.
Full method on our how we rate page.
The picks, compared
John Lewis & Partners Cot Bed Spring Mattress
Parents seeking a balanced, high-quality mattress · Type: Pocket spring | Firmness: Firm | Trial: 30 days
This mattress features 150 pocket springs for zoned support and a breathable cotton cover. It's firm enough for infants yet comfortable for toddlers. Owner reviews highlight its excellent edge support and durability.
What owners report: Owners report it retains shape well after years of use. Many appreciate the removable, washable cover.
- Excellent edge support
- Breathable cotton cover
- Removable and washable
- Heavier than some alternatives
- Premium price point
IKEA KRUMMELUR
Budget-conscious parents · Type: Bonnell spring | Firmness: Firm | Trial: Not specified
A budget-friendly option with Bonnell springs and a firm polyester cover. It meets safety standards and is lightweight for easy handling. Owners find it surprisingly supportive for the price.
What owners report: Many owners mention it's a great starter mattress. Some note it may not last as long as pricier options.
- Affordable price
- Lightweight
- Meets safety standards
- Less durable over time
- Non-removable cover
Silentnight Comfort Cot Bed Spring Mattress
Parents concerned about temperature regulation · Type: Pocket spring | Firmness: Firm | Trial: 60 days
Features a MiraCool® cooling layer to reduce heat build-up, with 150 pocket springs for support. The breathable cover enhances airflow. Owner reviews praise its ability to keep babies comfortable through the night.
What owners report: Owners say their babies sleep longer and don't wake up sweaty. Some mention it maintains firmness well.
- Cooling technology
- Good support
- Breathable cover
- Cover not removable
- Slightly higher price
Breathe Easy by Sleepyhead Cot Bed Spring Mattress
Toddlers who sleep on their side · Type: Pocket spring | Firmness: Medium-firm | Trial: 100 nights
Designed with zoned pocket springs that offer softer support at shoulders and hips, with firmer edges. The breathable bamboo cover is hypoallergenic. Owners note it accommodates changing sleep positions.
What owners report: Parents report their toddlers transition well from infant to toddler sleep styles. Some wish it had a firmer feel.
- Zoned support for side sleeping
- Hypoallergenic bamboo cover
- Breathable
- May be too soft for some infants
- Pricey
Mamas & Papas Sprung Cot Bed Mattress
Parents needing a low-cost, reliable mattress · Type: Bonnell spring | Firmness: Firm | Trial: Not specified
A basic sprung mattress with Bonnell springs and a wipe-clean cover. It's firm and meets safety standards. Owners confirm it's a solid choice for the price.
What owners report: Many owners say it does the job for a cot bed. Some note it may sag over time.
- Very affordable
- Firm support
- Wipe-clean cover
- Less durable
- No removable cover
The Little Green Sheep Natural Cot Bed Spring Mattress
Parents prioritizing firm support and natural materials · Type: Pocket spring | Firmness: Firm | Trial: 28 days
Made with 100% natural fillings like wool and cotton, and pocket springs for firm support. It's certified organic and flame-retardant-free. Owners love the natural, safe materials.
What owners report: Parents appreciate the eco-friendly construction. Some find it very heavy but worth it for quality.
- Natural materials
- Very firm support
- Organic certification
- Heavy
- Expensive
Sealy Posturepedic Cot Bed Spring Mattress
Parents wanting a hybrid of springs and foam comfort · Type: Pocket spring + foam | Firmness: Medium-firm | Trial: 30 days
Combines pocket springs with a memory foam layer for pressure relief. The cover is hypoallergenic and washable. Owners report it provides excellent support for growing toddlers.
What owners report: Owners note the mattress stays supportive and comfortable. Some mention it retains a bit of heat.
- Hybrid comfort and support
- Washable cover
- Hypoallergenic
- Heat retention possible
- Higher price
Frequently asked questions
What is the best firmness for a cot bed spring mattress?
The safest firmness for a cot bed mattress is 'firm' to reduce the risk of SIDS. A firm mattress supports your baby's developing spine and prevents suffocation. Most experts recommend a mattress that does not indent when you press on it.
How long should a cot bed spring mattress last?
A good-quality cot bed spring mattress should last from birth until your child moves to a single bed, typically around 4 years. Pocket spring mattresses tend to be more durable than Bonnell spring ones. Regular rotation can extend its life.
Are pocket springs better than Bonnell springs for cot beds?
Pocket springs are generally better because each spring moves independently, providing better contouring and reducing motion transfer. Bonnell springs are interconnected, which can lead to less support and durability. Pocket springs are often preferred for longer use.
What safety certifications should I look for in a cot bed mattress?
Look for BS 7177 (low flammability) and BS EN 16890 (safety for children's mattresses). OEKO-TEX Standard 100 certification ensures no harmful chemicals. These certifications guarantee your mattress meets UK and European safety standards.
Can I use a cot bed spring mattress from birth?
Yes, most cot bed spring mattresses are designed for use from birth. Ensure the mattress is firm and fits snugly in the cot with no gaps. Always use a waterproof cover to protect the mattress from accidents.
The verdict
For most parents, the John Lewis & Partners Cot Bed Spring Mattress earns our top pick for its balanced support and quality. Budget shoppers will appreciate the IKEA KRUMMELUR, while those prioritizing cooling should choose the Silentnight Comfort. All picks meet safety standards and have positive owner feedback.
