Allows your little ones skin to breathe extra large air holes for more relief and comfort allows your babys skin to breathe orthodontic and bpa-free 2 pcs. 18m+ allows your babys skin to breathe extra large air holes that ventilate the skin to stay drier, while your baby calms down. 98% nipple acceptance* when we asked parents to tell us how their little ones respond to silicone nipples, 98% said their baby accepts the Philips Avent Ultra Soft and Ultra Air pacifiers. 100% food-grade silicone nipple we consciously choose silicone as the material for the ultra soft and ultra air nipples, as it is a safe and inert material, which is widely used in medical applications and does not contain hazardous chemicals, endocrine disruptors (e.g. bpa) and allergens. natural oral development the orthodontic, symmetrical soft silicone nipples are designed with natural oral development in mind. natural feeling for baby the embossed silicone nipple is designed to simulate the feel of the mothers breast. sterilizes in 3 minutes, for practical sterilization the travel case that comes with the ultra soft and ultra air pacifiers also serves as a sterilizer. all you have to do is add a little water and put it in the microwave. That way it will be clean for the next use. Dutch design and manufacturing Ultra Soft and Ultra Air pacifiers are designed and manufactured in the Netherlands.