The new Nuk Space Pacifiers allow the baby's delicate skin to breathe. Their extra-large ventilation holes allow for maximum air circulation, which lets the baby's particularly sensitive skin breathe. The nipple is physiological silicone, they are BPA-free and predominantly made of polypropylene. Comes with a reusable sterilizing box to keep the Pacifier clean when not in use. Size 3 from 18 to 36 months, with Bear and Whale design.