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Any sleep surface that’s too soft could increase the risk of Sudden Unexpected Death in Infancy (SUDI). But how firm should a cot mattress be? We assess a range of mattresses from Boori, Grotime, Ikea, Stokke and more to see if they’re safe for your baby.
Our lab test results show:
- which cot mattresses passed the firmness test, which involves placing a test apparatus at various locations around the mattress and seeing whether it sinks too deeply into the surface
- whether the claimed measurements match up with the actual measurements.
We score a mattress down if the thickness is significantly more than stated, as this could end up being a fall risk depending on the depth of the cot (a cot should be a minimum of 50cm when the base is set in the lowest position, and 30cm in the upper position).
For many years, there was no way of telling whether a cot mattress was firm enough to be safe for your baby. However, responsible manufacturers test their mattresses to the voluntary standard AS/NZ 8811.1:2013, which outlines a method to detect mattress firmness.
Our interactive comparison tool helps you find out which models are safe. Our Recommended list will help you quickly see which models come out on top.