The Philips Avent Ultra Air pacifier for babies 6-18 months is designed with a lightweight, breathable shield for baby's sensitive skin. Four (4) extra large holes in the shield allow for maximum air flow, so skin stays drier while soothing; 84% of moms agree!* 98% of babies accept the nipple**, so you can feel confident with this choice. Comes with 2 pacifiers packaged in 1 sterilizer / carrying case that can be used to sterilize them with water in the microwave and transport them. *MetrixLab Home Placement Test with 118 U.S. moms, 2017 **98% of moms say their babies accept the textured nipple in our ultra air and ultra soft pacifiers, independent research, USA, 2016 - 2017