NUK Space pacifiers have a revolutionary shield that has extra-large openings, enabling maximum airflow and allowing baby's sensitive skin to breathe. Like all NUK pacifiers, NUK Space pacifiers are accepted by 95% of babies and feature our improved orthodontic nipple shape. NUK's asymmetrical nipple naturally fits baby's palate and allows more room for a natural sucking motion, reducing pressure on the teeth and jaw, and helping prevent teeth misalignment. The NUK pacifier is modeled after the natural shape of mom's nipple while breastfeeding, making for an easy transition from breast to pacifier and back. The heart-shaped shield fits perfectly under the baby's nose for easier breathing and less irritation. Comes with a reusable storage case that allows for easy cleaning in the microwave.