NUK/ Gerber - Orthodontic Pacifiers 6-Pack, Blue Dots (SZ 1 and 2): NUK Air System allows nipple to self adjust for proper fit Grooves in the pacifier shield allow air to circulate helping to prevent skin irritation Size 1 pacifiers are recommended for infants up to 6 months old Size 2 pacifiers are recommended for infants from 6-18 month...