Britax Adventure Car Seat is a lightweight booster seat for the older child The Adventure provides a safer, but inexpensive alternative to booster cushions, benefiting from Britax?s expertise in child safety. Britax Adventure Group 2-3 Car Seat is ideal for: Children weighing between 15 and 36kg Parents/carers looking for an economical safer alternative to a booster cushion Cars without ISOFIX fittings Moving between different vehicles Side Impact Protection provides optimum body protection in the event of a side collision.