This can often seem contradictory to many parents. It’s easy to assume that you should buy only the softest crib mattress available for your baby. However, this is not actually the case. Because a baby’s bones are still developing, they need even more support than you would think. For this reason, health experts recommend a mattress that is as firm as possible, but still comfortable. A general rule of thumb is that the mattress should spring back up when you push down on it and not leave a deep hand imprint. The options on our list are all designed to give your baby the best support possible by offering firm bedding with soft materials.