Since most crib mattresses are waterproof there is no need for a waterproof pad. This is the pad you do need! It is super soft and has just the right amount of cushion. It provides the perfect barrier between the vinyl mattress and crib sheet to create a comfortable and safe sleep experience for baby. It is easy care and still fits well after numerous washings. I have purchased these for all four of my grandchildren and they last from crib through toddler bed.