Introducing the Mother’s Choice kin AP convertible booster seat, a forward-facing harnessed seat in toddler mode, for your child from 6 months to approximately 4 years of age or until your child’s shoulders reach the middle shoulder height marker. Once your child outgrows the middle shoulder height markers, this seat converts to a booster seat; to be used with a lap-sash seatbelt from approximately 4 years of age to approximately 8 years of age, or until your child’s shoulders reach the upper shoulder height marker. The Mothers Choice kin AP convertible booster seat features AirProtect our superior side impact protection technology. A child's head is the most vulnerable part during side impact collisions. AirProtect shields your child in the instance of an accident by dispersing the energy forces away from your child's head. AirProtect unique design feels soft to touch for your child's convenience during everyday use or for those long road trips. The Kin AP convertible booster car seat guarantees extreme comfort for your growing child with a plush infant insert and new soft wicking fabric, with optimal wicking properties to keep your child cool and dry. The harness pad improves comfort for your child, and the entire trim can be easily removed for washing. The kin AP convertible booster car seat includes an intuitive one handed 5 position headrest adjuster, making transitions a breeze as your child grows. Narrow, yet comfortable seat allows for up to 3 seats across the back for parents with multiple children.