Child Car Seat TypesAll child safety seats are made and manufactured using the same process. However, thereare different types of seats for children of different size and age with specific guidelinesas to how they should be used. Infant seats - From the time a child is born, they must always ride in an infant seat which is most well known as a rear-facing infant seat. These seats are designed for a baby that weighs less than twenty pounds and should always remain facing the rear of a vehicle. Seats made specifically for infants are the smallest and have carrying handles for easy carrying and loading. They can be used until the infant is up to 22 lbs. depending on the instructions specified on each individual model. Convertible seats - Similar to the infant carrier, the second kind of car seat is the convertible. This seat can be used in a rear or forward facing position and is used for children typically beginning at 5 pounds up to 50 pounds. The rear-facing position is used for children who have not exceeded at minimum 20 pounds and are at least one year old. Some new model seats however, allow your child to stay rear-facing until 35 pounds. Once the child has reached the minimum requirements to be forward facing; the seat then can be turned around and used until the maximum weight is exceeded on the seat. There are typically no age parameters around which type of seat to use. It is primarily about the weight of the child. Combination seats - Next in the car seat progression is the 5 point booster; or combination. This is a forward facing only seat and has the 5 point harnessing system for children under 40 pounds. This seat is not recommended for use on children under 20 pounds. Usually at 30 pounds a child can transition into this seat. New models also allow the 5 point harnessing system to go up to 55 and even 65 pounds depending on the manufacturer. Once the child has exceeded the maximum weight allowance for the 5 point restraint system; the webbing can be removed and now you have a belt positioning booster. Booster seats - The earlier described combination seat can become a high back belt positioning booster. There is also a high back belt positioning booster that is available for that purpose only. The other type of belt positioning booster is the low back or no back booster. The major differences between the low and high back booster seats are head support. If your vehicle has bench seating and no headrest is supplied by the vehicle; you are required to use a high back booster. The purpose of the booster seats is to provide elevation to the child so the shoulder belt rests appropriately on the shoulder blade and does not ride up the child’s neck. It also provides “hips” that the seat belt can rest securely across and remain on the large bones of the child instead of resting across the soft tissue of the abdomen. This seat is available for children over 40 pounds up to over 100 pounds. From the ages of eight to twelve, children may have outgrown their booster seats and can be permitted to use regular adult seat restraints. It is suggested that, until the age of thirteen, the child remains in the back seat.