Cots and bassinets
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Cot mattress reviews

Last updated: 10 December 2025
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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 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).

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Childcare Plia
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Discontinued

Childcare Plia

Foam mattress

Passed firmness test 1
Measured length (mm) 965
Measured thickness (mm) 75
Measured width (mm) 605
$499
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Sealy Cherish
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Discontinued

Sealy Cherish

Inner spring mattress

Passed firmness test 1
Measured length (mm) 1300
Measured thickness (mm) 140
Measured width (mm) 695
$300
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