The 0-3 month Flexy Pacifiers have a softer nipple for those early newborn stages. It is as soft as skin, and the silicone is so flexible that it elongates comfortably for newborns, to help prevent nipple confusion. Our orthodontic 3m+ size Flexy Pacy is perfect for older babies. With a slightly firmer feel, it compliments growing babies as they are teething and meets the oral development needs for your baby's growth.