The top - selling crib mattress provides a safe, comfortable sleep surface that easily converts from a firmer infant side to a softer side that is more appropriate for toddlers. (colgatekids.com)
This eco-friendly mattress features dual side - the plant - based infant side and nice plush toddler side. (topcribmattressreviews.com)
This one also has a firmer infant side and a softer toddler side. (thespruce.com)