Babies have a large and heavy head compared to the rest of their body. In addition, their neck muscles are not yet fully developed. If the baby is transported in a forward-facing position, his or her head will be thrown forward in the event of a head-on collision. This can cause serious neck injury and may even be fatal. By placing the baby in a rear-facing position, the forces exerted during the crash will be distributed across the baby’s entire back. Discover more about rearward facing travelling.