The 0-3 month Flexy Soothers have a softer teat 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 teat confusion. Our orthodontic 3m+ size Flexy Soother is perfect for older babies. With a slightly firmer feel and compliments growing babies as they are teething and meets the oral development needs for your baby's growth.