The Kidfit Is Designed For Children Between 3-12 Years, Between 38-57 Inches Tall, Between 30-100 Pounds In High-Back Mode And 40-110 Pounds In Backless Mode, And Can Sit Relatively Still In The Same Seated Position Throughout The Car Ride.10 Positions Head And Shoulder Protection Against Side Impacts.Molded Seat With Triple Foam Padding.It Is Adjusted To Mimic The Position Of The Vehicle Seat.The Removable Backrest Makes It Easy To Convert Kidfit Into A Backless Reinforcement.The Cup Holder Is Removable For Easy Cleaning Recommended Age: Suitable For 4 Years & Above