Rank #7 in Best Cot Mattress 2026: 10 Ranked, One Model at Two Prices
Obaby Fibre Cot Bed Mattress, 140x70x10cm
Price and rating as shown on Amazon when we collected them. Both change.
The Obaby Fibre Cot Bed Mattress is a 140 x 70 cm cot bed mattress priced at £39.00, sitting at number 7 in this guide. It carries a 4.5 rating from 61 ratings, and Obaby lists it as Firm, with 2 layers, a polyester cover and a fibre fill.
Two things on its own page do not line up. The dimensions field reads '140L x 10W x 70Th centimetres', while the size field says 140x70 cm and the thickness field says 10 centimetres — so the width and thickness labels appear to be swapped. The star breakdown also adds up to more than the stated total: 73 five-star, 13 four-star, 11 three-star and 3 one-star comes to 100, not 61. Everything on this page is taken from the Amazon listing, not from any testing we carried out.
How those 61 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £39.00 |
|---|---|
| Rating | 4.5 out of 5, from 61 ratings |
| Rating breakdown | 73 five-star, 13 four-star, 11 three-star, 3 one-star — a total of 100 (as listed) |
| Item firmness description | Firm |
| Number of layers | 2 |
| Item dimensions L x W x Thickness | 140L x 10W x 70Th centimetres (as listed) |
| Item thickness | 10 centimetres, with the size field reading 140x70 cm |
| Construction type | Foam (as listed), while the fill material and material type both say Fibre |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“This is a great mattress and fits our Obaby Belton cot perfectly. I particularly like that it has a removable and washable sheet already protecting the mattress. Would buy again.”
Verified purchase“I expected this mattress to feel cheap and be too firm because of the price, but when it arrived I was pleasantly surprised. Its supportive but still has a decent enough bounce and our daughter looks very comfortable in it.”
What it is up against
The rivals it was ranked against in Best Cot Mattress 2026: 10 Ranked, One Model at Two Prices.
Questions people ask
What size cot bed is the Obaby Fibre Mattress made for?
Obaby lists it as a 140 x 70 cm mattress and says it is designed to fit most 140 x 70 cm cot beds, providing a snug and secure sleeping surface.
How firm is it?
The listing's firmness field says Firm, and Obaby describes it as providing the ideal level of firmness for safe sleep from newborn to toddler years.
Do the dimensions in the listing agree with each other?
No. The size field says 140x70 cm and the thickness field says 10 centimetres, but the dimensions field reads '140L x 10W x 70Th centimetres', so the width and thickness labels do not match the rest of the page.
How many layers does the Obaby Fibre Mattress have?
The listing states 2 layers. Obaby's bullets describe a durable fibre construction that maintains shape over time, without giving a layer count.
Can the cover be washed?
Obaby's care bullet says simply to spot clean or air it, and the cover material is listed as Polyester. The listing does not describe a removable washable cover, although one customer review mentions a washable sheet already protecting the mattress.
What is the rating and how many people gave it?
4.5 out of 5 from 61 ratings, though the star breakdown shown on the same page adds up to 100.
Comments
Reader comments are not checked against the manufacturer's claims above.
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