NUK Perfect Match Air Pacifiers are thoughtfully designed to allow baby's sensitive skin to “breathe." The unique shape features extra-large openings in the shield that allow for maximum airflow to help prevent drool rashes. NUK Perfect Match Air Pacifiers are accepted by 98% of babies and feature the perfect nipple shape to help support baby's natural oral development. Invented over 60 years ago by pediatric dentists and doctors, NUK orthodontic pacifiers are modeled after the natural shape of mom's nipple while breastfeeding, creating an easy transition from breast to pacifier and back. All pacifiers are BPA free and dishwasher safe (top rack only).