Give your little one the best and safest sleeping space with our top cot mattress tips.Cot mattress safetyA crucial part of baby cot safety is choosing the best cot mattress. Here are our tips to make sure your cot mattress measures up. Make sure you choose the right size of mattress. Make sure the mattress is firm and flat, and protected by a waterproof cover Avoid second-hand mattresses where possible. Check any mattress you use conforms to current safety requirements. Mattresses should carry the BSI number BS 1877-10:2011+A1:2012. The mattress should fit the cot with no gaps down the side that are more than 4cm. The Lullaby Trust recommends you buy a new cot mattress for your baby, where possible. If you have a second-hand mattress, whether it's a mattress you've used for one of your other children or one that has been given to you, check the following: That the mattress is in good condition; that it's flat, firm, not soft, fits the cot without any gaps and doesn't sag.
It has been cleaned and dried thoroughly. Check that it was previously used with a waterproof cover. Make sure you use it with a waterproof cover. Check it's free from cracks or tears or holes. Find the best cot bed to use with your cot mattress in our cot bed reviews. Choosing a cot mattressCheck the cot mattress sizeA mattress around 8-10cm thick is enough to support your baby.Mattresses come in two basic sizes to fit the equivalent sizes of cot generally available in the shops. Your cot will specify which type of cot mattress it requires: standard (56x118cm) or continental (60x120cm). If the mattress is the wrong size, your baby could be dangerously trapped in gaps between the cot and the mattress. The gap between the mattress and the cot should be no more than 4cm (1.5 in)If you buy a cot that is smaller or larger than the norm, you can get mattresses specially made to fit your cot.Choose one that's easy to keep cleanTo keep the mattress as hygienic and clean as possible, choose one with a PVC-covering or a removable top panel that you can wash at a reasonably high temperature.
Squeeze for firmness and measure for thicknessSqueeze a selection of mattresses in the shop and choose one that feels firm rather than soft. To compare firmness, squeeze at the edges and at the centre. Your baby needs a mattress that provides good support and won't sag.Look for a cot mattress that is around 10cm thick. Anything thinner won't provide the support your baby needs. Thin foam, in particular, can lose its shape and dent easily.A travel cot mattress should be no more than 10cm thick and you should expect the mattress in a crib or Moses basket to be no more than 5cm thick. These thicknesses are specified in BS 1877:Part 10:1997, the safety regulations that govern cot mattresses.Check out our Best Buy cot beds.Sign up for a £1 Which? trial to access these and our thousands of other independent reviews. Types of cot mattressesFoam mattressesFoam mattresses tend to be the least expensive. The simplest versions are made from a single layer of supportive foam completely covered with a wipe-clean, waterproof PVC cover.
Some foam mattresses have ventilation holes, but these aren't necessary. Generally easy to keep clean. Good value for money. Can provide good support and resistance to denting. Some parents may not like the idea of the basic PVC-covered mattress because of concerns about clamminess. Mattresses with ventilation holes (designed to help keep your baby cool) can be more effort to keep clean if your baby is a dribbler or is often sick, because residue can gather in the holes and mesh. Safe sleeping tips – essential bedtime know-how for parents.Spring-interior cot mattressesThese traditional mattresses have a coiled spring interior with layers of felt and foam padding. They often have a cotton cover on one side and PVC or other wipe-clean material on the other. Many parents like the familiarity of a traditional spring mattress. The wipe-clean side is the recommended surface for your baby to sleep on because of the practical advantages, but you can flip it over onto the cotton side if you prefer – eg, if it's hot and your baby feels clammy.
More expensive than foam mattresses. The cotton side may be preferred for comfort but can be more difficult to keep clean (unless you buy a mattress with a removable panel). Coir or natural fibre cot mattressesThese have a core of coconut fibre with other layers of different materials. These mattresses are available with a wipe-clean covering. One of the firmest types of mattress. Tend to last longer because they hold their shape well, so could be a sensible purchase if you want to use it for more than one child. Less widely available than foam or spring interior. Can be more expensive than the alternatives. Hypoallergenic cot mattressThese have a quilted top layer that can be easily detached from the body of the mattress, so you can wash it at 60°C to kill any dust mites that may cause allergies.Allergy UK has a list of approved mattress covers and bedding on its website.ProsEasy to keep cleanConsMay be more expensive than other kinds of mattressUsing cot beds safely – now you've got your mattress sorted, check out these safety essentials.
Top 5 Compared: The Best Crib Mattresses For Your BabySkip to main content Buyer's guide to baby mattresses Whether you buy a Moses basket, crib, cot or cotbed, you'll need to think about a mattress. Here's how to buy the right one What is a baby mattress?So you’ve chosen a bed for your baby... now what about a baby mattress? There are many different options to choose from, in terms of style and whether you need something to fit a Moses basket, crib, cot, cotbed, travel cot or a pram/carrycot. There are even baby mattresses for hanging cradles. Once you know what type of bed you’re buying the mattress for, you can choose from different fabrics and construction. The main baby mattress types are foam, sprung, pocket sprung, natural fibre, or even a combination of any of the above. You may find that the bed you buy already comes with a mattress, but don’t feel obliged to use that one just because it’s included in the price. It’s important that you buy a mattress that you are really happy with, given how many hours your baby will spend on it.
Should you buy new or secondhand?It’s best to always buy a new mattress for your baby, and that includes when more baby brothers and sisters come along. Your baby needs a firm, clean and supportive mattress. The danger with a secondhand mattress is that it can have lost its shape and may contain hidden bacteria and dust mites. It will also probably be less comfortable. Sadly, there’s evidence to suggest that SIDS, or cot death, is linked to secondhand mattresses. FSID’s Sleep simple sleep safe resource states, “Ideally you should buy a new mattress for each new baby. If you are not able to do this, use the one you have, as long as it was made with a completely waterproof cover and has no tears, cracks or holes. Clean and dry it thoroughly.” Make sure that any mattress you buy conforms to both BS 1877 Part 10 1997 for safety and performance and BS 7177 1996 for flammability. Mattresses that meet the relevant BS standards give you the confidence that what you’re buying for your baby is safe.
What size do you need?Some retailers refer to ‘standard’ and ‘continental’ size types for baby cot mattresses, but there are a wide variety of dimensions out there so it’s vital that you make sure you buy the correct size. The gap between the mattress and cot sides and ends should not be more than 4cm when the mattress is pushed tightly to one side or there’s a risk that your baby’s limbs could get trapped. There may be a sticker with your cot or basket that recommends the ideal size, whilst some shops list their mattresses by brand of cot or pram. If you’re not sure, accurately measure the interior length and width of the basket or cot base once it’s assembled. Generally, the depth of the mattress should not exceed 10cm for cots and it will be thinner for Moses baskets. There are plenty of companies out there online who will supply you with a made-to-measure mattress if you can’t find the exact size you are looking for. What type do you want?Whichever type of mattress you choose, it needs to be firm.
Imagine if your baby turns over – he can’t easily move himself if his face sinks into a squishy mattress, so he needs a more solid sleep surface than us grown-ups. Squeeze the edges and the centre of the mattress to ensure that support is there. You can choose from the following types, which generally increase in price: Foam – the cheapest option providing a core of foam, often encased in a wipeable, waterpoof cover (look for non-toxic PVC). Choose a high-density foam providing good support and comfort. Some foam mattresses also have ventilation holes. Sprung – made with sturdy coils offering firm support. Pocket sprung – constructed from individual steel springs sewn into small fabric pockets. Each spring can then individually respond to the contours of your baby’s body. Natural fibre – such as coir, coconut, latex, mohair, lambswool, cashmere or silk, which are recommended for their properties of moisture absorption. PurFlo - a hollow mattress, made by PurFlo, that has good air circulation and is similar price to a pocket sprung mattress.
Depending on the type of mattress you opt for, turn it regularly to maintain its shape and/or rotate it head to foot so both ends are used equally. Do you need a cover?All baby mattresses are covered with an outer fabric layer. FSID’s recommends that the outside of the mattress should be waterproof, so most covers have a waterproof side and a fabric side. But not all of these covers will be removable for washing. If it isn’t removable, do remember to frequently wipe clear the PVC surface and vacuum or sponge-clean the bottom cotton cover of the mattress base. You can also buy a separate spare mattress cover to make it easier to keep your mattress clean and deal with those inevitable nappy explosions. Ideally, choose a mattress with a removable cover that can be washed at 60 degrees as that is the temperature needed to kill the dreaded dust mites. Some mattresses also come with moveable waterproof sleeves (within the cover) to protect the core. Specialist baby mattress manufacturers will allow you to select different types of fabric covers, such as: