Breathable BPA-free pacifier, with extra-large ventilation holes that allow the baby's skin to breathe to keep it dry while soothing it. 98% acceptance of the nipple: when we asked mothers how their little ones responded to our soft silicone nipples, an average of 98% said their baby accepted Philips Avent ultra air pacifiers. 100% silicone nipple: Our Philips Avent ultra soft and ultra air nipples are made entirely of food-grade silicone and do not contain dangerous chemicals such as BPA or allergens. Natural oral development: Our anatomical and symmetrical silicone nipples are designed to promote natural oral development. Natural sensation for the baby: Our comfortable and natural textured silicone nipple is designed to mimic the sensation of the mother's breast.