Extra-large airholes let baby's skin breathe, keeping skin drier for ultimate soothing comfort; 9 out of 10 parents agree that Philips Avent Ultra Air pacifiers are comfortable for their little one² Specifically designed to comfort babies aged 18 months and older, with orthodontic⁴, symmetrical extra-firm silicone nipple; narrow neck nipple design helps reduce pressure on teeth and gums Extra-firm nipple respects the natural shape of the palate, teeth and gums, supporting healthy teething and speech development; the textured silicone nipple mimics the feel of mom's breast Kinder to the planet: give the best care with less environmental impact − the Philips Avent Ultra range features pacifiers and sterilizing cases made using 80% plant-based materials¹ Reusable carrying case that doubles as a sterilizer so pacifiers are always ready to use: add water and microwave for 3 minutes for easy sterilization that generates up to 50% less CO2 emissions³ The set includes: 4x Philips Avent Ultra Air pacifiers 18 months, 2x sterilizing/carrying cases