In general, younger children need a firmer sleep surface without sinkage to support their spine and aid proper growth. As they get older, kids tend to prefer a plusher surface with more cushioning and contouring.
However, every child is different, so we can't recommend an exact timeline for flipping their mattress. Instead, we urge parents to continuously talk to their children about what feels best and consult their pediatrician about their developmental needs. The Nolah Nurture's border handles make it easy for parents to flip the mattress, so you can always switch back based on your child's feedback.
Of course, your child will grow and likely change their sleep preferences over the years. That's why we built our kids' mattress with a flippable design and different firmness levels on the opposite sleep surfaces.
The Nolah Nurture features a Luxury Firm side (6-7/10 firmness level) and a Plush side (4-5/10), ensuring your child always has a comfortable option regardless of their size or sleep position. At every stage of development, your child can decide which side they want to use.