Best Cot Mattress 2026: 10 Ranked, One Model at Two Prices

It leads on evidence rather than claims. 3,682 ratings at an average of 4.6 is the biggest and steadiest sample in this cot mattress line-up, and 76 per cent of that distribution is five-star. That matters more than a longer bullet list when you cannot see the mattress in person. At £43.61 it also sits £16.39 below the sprung Tutti Bambini and £26.38 below the CuddleCo.

The core is EcoLoft fibre, described as a recycled and foam-free alternative, with a polypropylene quilted cover over the top. Three layers, a stated 15kg maximum weight capacity, and a total weight of 2.5kg. It is reversible, the surface is water resistant, and the cover unzips to go in the machine at 40°C, so a spill does not mean a new mattress. BSI certification to BS EN 16890 and BS 7177 is stated, and the cover is listed as Oeko-Tex 100.

Do not buy it if you want springs or a thicker profile. This is a 10cm firm cot mattress, not the 15cm depth of the MHG and Opulent Home listings, and there is no coil count to set against the Tutti Bambini's 200. It is also listed as not foldable, so it will not suit anyone storing it between children. Worth noting: the spec table disagrees with itself, since 'Mattress Comfort Layer Material' reads 'Comfort Foam' while the core and the fill are both listed as fibre.

This is the one mattress in the ten with springs inside it. The spec table lists 200 pocketed coils beneath high-density nursery-grade foam and a quilted outer, a different construction from the fibre and foam cores everywhere else in this cot mattress ranking. 1,187 ratings at 4.5 back it up, with 75 per cent five-star.

In practice, the sprung core is why it weighs 4kg — more than any other cot bed mattress here, which range from 2.2kg to 3.1kg. Three layers, 10cm deep, a water-resistant cover, and a stated fit for 140x70cm cot beds only. The listing says the cover can be machine washed at 60°C.

However, the spec table says 'Hand Wash Only' under Product Care Instructions while the bullet promises a 60°C machine wash. Those two statements cannot both be right, and the answer decides whether a nappy leak is a ten-minute job or an afternoon. It is also not foldable and not portable. Skip it if you want the lightest mattress you can lift out one-handed, or if you need 15cm of depth.

Third because 245 ratings at 4.5 is a solid sample for the money, and the listing promises a 10-year warranty with free replacement of non-human damage for the first two years. At £42.48 it is the second-cheapest mattress in the top five. The catch is in the spec table: 'Item Dimensions' reads 130 x 70 x 10 centimetres while the title and three other fields say 140x70x10. One of those is a typo, and the page does not tell you which.

The core is listed as memory foam at medium firmness, two layers, with a breathable fibre surface. The reverse of the cover is TPU, which blocks liquid from reaching the foam, and elastic straps plus an anti-slip backing hold it in place. It arrives roll-packed, and the listing asks for 24-48 hours in a ventilated room until it has fully expanded.

Worth noting for anyone replacing a baby cot mattress: memory foam at 'Medium' behaves differently from the firm fibre cores at the top of this list, and some parents specifically want the firmer surface. It is also the only 140x70 option here that needs time to expand before first use, so it is a poor choice if you need a mattress tonight. At the same time, if the 130cm field turns out to be the real measurement, it will not fit a standard cot bed at all.

Fourth, and this is the listing at the centre of the price question. Its model number is MHG-COT-MATTRESS, and the same model number appears on a second listing priced at £56.17 with 32 ratings. Both are described the same way: 140x70x15cm, four layers, thermal-bonded fibre, 'PU Waterproof, Noiseless Sleep'. This one has 186 ratings at 4.4 and costs £47.17, so the £8.99 difference buys nothing you can name.

The build is a four-layer thermal-bonded fibre core with a PU waterproof membrane and a quilted polyester cover. At 2.2kg it is the lightest here, which matters when you are lifting a cot mattress out of a cot bed one-handed. The cover unzips and machine washes. The listing says it is compressed and roll-packed, needing 48-72 hours to recover its shape, though it can be used while it does.

That said, 17 per cent of its ratings sit below four stars, against 10 per cent for the Mother Nurture at the top, and the three-star share alone is 11 per cent. If you want 15cm of depth and a zipped washable cover under £50, this is a reasonable buy. If springs or a longer track record matter more, look at the Tutti Bambini or the Mother Nurture. There is no coil count here, and no care instruction beyond 'Machine Wash'.

Fifth because it is the lowest price in the ten at £34.99, and it still names its standards: BS EN 16890:2017 + A1:2021, BS 1877-10:2011 + A1:2012, and BS 7177:2008 + A1:2011 for low hazard domestic use. 107 ratings at 4.4. It is made in the UK, with a country of origin to match.

The core is high-density foam, two layers, 10cm deep, 3kg. In practice that makes it a cot mattress with washable cover that goes into the machine at 40°C and is tumble-dry friendly, which is more than some pricier listings offer. The cover is polyester and breathable, and the listing repeats the standard advice to check your cot's internal dimensions before ordering.

Even so, the spec table and the copy disagree on firmness. 'Item Firmness Description' reads 'Medium', while the bullets describe high-density foam giving 'firm, comfortable support'. If you specifically want a firm cot mattress, this is a judgement call rather than a stated fact. It is also foam, not sprung or fibre, and no maximum weight capacity is given.

Sixth: the depth for the money is the argument. £46.74 buys a 140x70x15cm mattress, four layers, with the same PU waterproof membrane and thermal-bonded fibre core as the listings above it. 126 ratings at 4.2. Meanwhile the rating spread is the weakest in the top eight: 16 per cent one-star, nothing at two stars, and 7 per cent at four.

The cover is diamond quilted, zipped and machine washable, and the listing markets it as a breathable cot mattress suitable for travel cots, portable cribs and cot beds. At 2.5kg and 15cm it is bulky to store. The core is described as an 'ECO Friendly Fibre Core Foam Alternative', which means fibre rather than foam, even though 'Poly Foam' appears under comfort layer material.

By contrast with the fibre listings above it, the firmness field here says 'Medium' while the first bullet promises 'Firm Support For Growing Babies'. And a 16 per cent one-star share is the single clearest warning sign in this set. Skip it if you are not comfortable buying a cot mattress with that rating spread, or if you need one that folds away.

Seventh on price and size: £39.00 for a 140x70x10cm fibre mattress, 2.58kg, firm, hypoallergenic and water resistant. 61 ratings at 4.5. Crucially, this is the listing whose own spec table contradicts its title. 'Item Dimensions L x W x Thickness' reads '140L x 10W x 70Th centimetres', and the shorter 'Item Dimensions' field reads '140 x 10 x 70'. Every other field says 140x70x10, so the width and thickness look swapped — but a buyer scanning the table would see a 10cm-wide mattress.

The construction is listed three ways: 'Construction Type: Foam', 'Fill Material: Fibre' and 'Material Type: fibre', with the comfort layer down as 'Comfort Foam'. The product name says fibre. It is light, and the care instruction is to spot clean or air it rather than wash it, with no removable cover. At £39.00 it undercuts the 15cm listings by roughly £7 to £8.

That said, if you want a removable, machine-washable cover, this is not it. It is also the thinnest full-size 140x70 option here at 10cm, so anyone wanting a deeper surface should look at the MHG or Opulent Home listings. In short, it suits a parent who wants a cheap, light, firm cot mattress and is happy to sponge it clean.

Eighth on price alone: £69.99 is the highest here, £26.38 above the cheapest. 72 ratings at 4.6 is a strong average. For that money you get a 140x70x7cm nursery foam core, a bamboo fabric cover, a dual-purpose design with moisture wicking on one face and a waterproof easy-clean training layer on the other, and a cover that washes at 40°C.

As a hypoallergenic cot mattress it is aimed at allergy and asthma management, and the listing states compliance with BS EN 16890, BS 7177:2008, and testing against the Furniture and Furnishings (Fire) (Safety) Regulations 1988. It weighs 2.7kg. The 'superior nursery foam inner' is described by the brand as more supportive than memory foam, which is a claim rather than something the spec table shows.

However, the firmness field says 'Plush' while the special-features field says 'Firm' and the product title says 'Firm'. Those three cannot all be right, and firmness is the one thing you cannot test through a screen. At 7cm it is also 3cm thinner than the 10cm options and 8cm thinner than the 15cm ones, a real difference inside a cot bed frame. If you want maximum depth for your money, this is the wrong end of the list.

Ninth because £30.99 sits close to the floor of this market, and 46 ratings at 4.3 is a small but workable sample. The listing claims waterproofing, anti-allergy materials, a breathable cover and a 'firm yet comfortable foam core'. Meanwhile the spec table's construction type reads 'ECO Friendly Fibre Core Foam Alternative', and the fill material matches it, so the core is fibre, not foam.

It is 7.5cm deep, 2.5kg, four layers, with a PU waterproof layer and a zipped cover. Care instructions read 'Hand Wash Only, Machine Wash' — both, in the same field. In practice, 7.5cm is the second-thinnest option in this cot bed mattress group, and the title's claim of 'Extra Thick Support' sits awkwardly beside the 15cm listings at similar prices.

Either way, these are the numbers to weigh: 9 per cent of ratings are one-star and 6 per cent are two-star, so 15 per cent sit below four stars, worse than the Mother Nurture, the Pinkfairy and the Gwydre. Buy it if price is the deciding factor and 7.5cm fits your cot. Do not buy it if you specifically want a foam core, because the fill is listed as fibre.