The Philips AVENT SCF ultra air pacifier for babies 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 percent of moms agree. 98 percent of babies accept the nipple, so you can feel confident with this choice. Comes with 4 pacifiers packaged in 2 sterilizer/ carrying cases that can be used to sterilize them with water in the microwave and transport them. Metrixlab home placement test with 118 U.S. Moms, percent of moms say their babies accept the textured nipple in our ultra air and ultra soft pacifiers, independent research, USA,