British Airways uses convertible seats on their European Regional network (but not domestic flights).

Many convertible seats will transition from a rear-facing seat, to a forward-facing seat, and some then can be used as a booster seat.

Many convertible seats allow for 5-35 lb.

Most convertible seats in the U.S. have at least a 30 lb rear-facing weight limit, most now to go to 35 lbs, some 40 lbs, and a few 45.

Forward-facing child seat or convertible seat: The restraint positions a child upright, facing the direction of travel.

You read about champagne with submarine sandwiches and art dealers who sip name-brand beer in convertible back seats.

However, some convertible seats, when used facing rear to hold infants, are too large for the back seat.

An ideal transition for a child graduating from a convertible seat, to a booster seat, without compromising safety.

In an industry first, the G6 convertible seats four, uses a power-retractable hardtop, and has a starting price of less than $29,000.

Children who reach 20 pounds before their first birthday should also ride facing the rear in a "convertible" seat; after the first birthday, that seat can be turned around.