Mattress for a toddler to grow into

Hi sab,

A firm/medium will probably provide better support/alignment than a firm/firm combination. The goal of a mattress is always to provide good alignment which means that it needs to be firm enough to “stop” the heavier parts of the body and soft and contouring enough to fill in the recessed gaps in the body profile. A sleeping surface that is too firm can result in support/alignment issues just as much as a mattress that is too soft. There is more about primary support and secondary support and the relationship between firmness/softness and good alignment in post #2 here. I would tend to follow Neal’s suggestion.

I’m not familiar with any specific differences between them but I would treat them as close equivalents. While both are high quality foundations … they may be more costly than what you need and it may also be worth considering some of the less costly KD foundations that are mentioned in the foundation post here that would also be suitable for a latex mattress.

Phoenix