Pallas G I-Size car seat: the safety that grows with your child The Cybex Pallas G I-Size is a car seat that grows with your child, offering him more than ten years of comfort and protection according to the last I-Size standard. Cybex has developed a safety shield that provides protection, comfort and freedom of movement during all car trips. This 2-in-1 seat adapts to your child's growth and ensures its safety at each stage of its development.