ECE ISize approved for children 125-150cm tall: the energy-absorbing structure, the additional energy absorbing foam and shoulder belt safety guide work in conjunction with the booster's special belt path design to provide your child enhanced safety and crash-protection in every ...ECE ISize approved for children 125-150cm tall: the energy-absorbing structure, the additional energy absorbing foam and shoulder belt safety guide work in conjunction with the booster's special belt path design to provide your child enhanced safety and crash-protection in every vehicle and on every drive. The booster seat was purposely designed to fit modern vehicle's deep bucket seats and to fit 3-across in most vehicles.