To ask which type of mattress your children sleep on?

[Frume]

I'm needing to get DD's new mattresses. A year or so ago we bought them both a Jaybe one from Argos due to the good reviews, but found them to be poor and uncomfortable.

Is there an age limit on memory foam mattresses or are they not advised for young children? They are 6.5yo and 5yo.

Any recommendations would be much appreciated!

My dd has a nice one from ikea.
Similar to mine!
Cost about £90 and she loves it
It has springs, but a foam top layer.
She has had it since she was 5. Dont remember seeing any age restrictions on it.