Finding a mattress that you enjoy can be hard work. You have to test out all the different ones in the store - and then you never really know how good it is until you sleep on it. Well the same goes for crib mattresses. You want to make sure that you get a mattress that is pretty firm - that will help reduce the risk of S.I.D.S, but you want some softness so your baby will be comfortable sleeping on it too. This one is also lightweight and waterproof - so you won't need a waterproof pad under the sheets.