Key takeaways
France limits formamide in foam mats to 200 mg/kg, whereas the European Directive 2009/48/EC allows up to 5,000 mg/kg. This 25-fold gap is the only criterion that really separates a safe mat from a risky one. Formaldehyde, often confused with formamide, is a different substance and is not the central issue for EVA and XPE foams.
1. The different types of foam used in baby mats
EVA foam – the market standard
EVA (ethylene-vinyl acetate) is the most widely used foam in baby foam mats. Light, soft, waterproof and impact-resistant, it offers a good balance of comfort and protection. It is also the material at the heart of regulatory recalls: it was in EVA puzzle mats that formamide was detected at problematic levels.
XPE foam – cross-linked polyethylene
XPE is a closed-cell polyethylene, cross-linked either chemically or by electron beam. Its structure does not rely on formamide as a blowing agent, unlike the cheapest EVA processes. It is denser and more durable than standard EVA, for a price 30 to 50 % higher.
Polyurethane (PU) – a coating, not a core
Polyurethane is rarely the main material of a mat. It is used as a surface coating: smooth, waterproof and easy to wipe clean with a cloth. It is the material of choice for foldable play mats.
Expanded PE foam – the entry level
Entry-level puzzle mats often use non-cross-linked expanded PE. Less dense and less durable, it flattens more quickly. Best kept for occasional use.
2. Formamide: the only figure that really counts
What French regulations say
Formamide (CAS 75-12-7) is classified as toxic to reproduction under Regulation (EC) No 1272/2008. Since the order of 1 August 2012, renewed every year, France has suspended the import and sale of foam puzzle mats containing more than 200 mg/kg of formamide. The reason given by the French Ministry of the Economy is the prevention of serious risks to young children’s health (reply from the Ministry of the Economy, French Senate, 23 May 2013).
What Europe allows
Directive (EU) 2015/2115 added formamide to Annex II of the Toy Safety Directive 2009/48/EC. It sets an emission limit of 20 µg/m³ after 28 days of testing, but only for foams with a content above 200 mg/kg. The content threshold commonly applied remains 5,000 mg/kg, which is 25 times the French limit.
The levels actually measured
A study published in Analytical Methods (2016) measured levels of 32 to 1,364 mg/kg in five EVA puzzle mats on sale. The authors note that more than half of the formamide present is released in the first two weeks after the packaging is opened (Anal. Methods, 2016, 8, 5228-5233).
The ANSES recommendation
ANSES, the French agency for health and safety, recommends limiting as far as possible the exposure of children under three to the formamide found in puzzle mats. It advises airing products for several days after unpacking. This expert assessment formed the basis of the French order.
3. How to check in practice before you buy
Three checks are enough to rule out most risky products:
- Ask the seller for a formamide test report with figures in mg/kg, issued by a third-party laboratory (Intertek, SGS, Eurofins). A simple “CE compliant” statement is not enough: CE marking is self-declared by the manufacturer.
- Check for the EN 71 standard (toy safety), in particular EN 71-3 on the migration of chemical elements.
- Smell the product when it arrives. A chemical odour that persists after 24 to 48 hours of airing in a ventilated room is a warning sign.
4. Foam puzzle mats: the most exposed format
The puzzle format lets you customise the surface and replace a damaged tile. But it is also the format targeted by the French order, and its removable edge pieces are a choking hazard for babies. Always remove the decorative edge pieces, or choose a one-piece mat.
5. What thickness to choose
For time lying on the back, 1 cm is enough. For tummy time and active movement, aim for 1.5 cm minimum. To cushion falls as your baby learns to sit and then stand, go for 2 cm or more. Our 15 mm XPE play mat sits at the upper end of this recommendation.
6. Care and lifespan
Most foam mats can be cleaned with soapy water. Avoid concentrated bleach and acids, which damage the foam and the coating. A quality mat lasts 3 to 5 years. Signs of wear to look out for: a loss of around 30 % of its thickness, the coating peeling off, tears.
7. Foam puzzle mats and bacteria: do they need disinfecting?
No, but regular cleaning of the joins is essential. EVA and XPE foams are closed-cell: they absorb neither water nor milk. The problem with a foam puzzle mat lies in the gaps between the tiles, where crumbs, regurgitated milk and moisture collect and where micro-organisms multiply.
The method that works
- Once a week, or after every mishap, take the tiles apart and wash them in warm soapy water, joins included.
- Rinse, then leave to dry completely, flat, before putting it back together.
- If someone in the family has a stomach bug, a household disinfectant suitable for plastics, rinsed off with clean water, is enough.
A one-piece mat solves the problem at the source: it has no joins. The routines that apply to all your equipment are in our guide to caring for nursery products.
8. EVA foam smell on delivery: how long does it last, and what should you do?
The smell of a new foam mat comes from volatile compounds being released, including formamide in the most poorly made EVA foams. The study cited above shows that more than half of the formamide escapes in the first two weeks: this is the period when a baby should not use the mat.
What to do in practice
- Unpack the mat as soon as it arrives and unfold it completely, with the tiles separated if it is a puzzle mat.
- Leave it to air for 48 hours to a week in a ventilated room where your child does not sleep. Do not heat it: heat warps the foam.
- If the smell persists beyond a week, send the product back: it indicates a high content of volatile substances.
XPE foam, made without formamide, generally gives off very little odour.
9. Large foam play mat: what size for the room and your child’s age?
The right size depends on your child’s age and the floor space actually free, not the total floor area of the room:
- From 0 to 6 months, a 100 × 100 cm square covers their needs, tummy time included.
- Once your baby starts rolling over and crawling, at around 6 to 9 months, a large play mat of 150 × 180 to 180 × 200 cm stops them leaving the cushioned surface every time they move.
- When your baby starts pulling up to stand, allow 50 cm of mat beyond the piece of furniture they pull themselves up on: that is where they will fall.
A puzzle mat grows tile by tile, at the cost of the joins mentioned above. A foldable one-piece mat offers 180 × 200 cm in a single piece and can be put away at the end of the day. Don’t cover the whole room: leave doorways and walkways as bare floor. Our article on size and thickness by age adds to these guidelines, and the one on choosing between a playpen and a play mat helps when space is tight.
Conclusion
The EVA versus XPE debate rarely comes down to comfort. It hinges on one figure: the formamide content, capped at 200 mg/kg in France compared with 5,000 mg/kg in the rest of the EU. Ask for this figure before you buy. To find out more, read our guide to choosing a play mat and our EVA / XPE comparison.
