Why do motorcyclists' helmet have a layer of cusion?

Motorcyclists' helmets have a layer of cushioning to absorb impact energy during a crash, reducing the risk of head injuries. This cushioning helps to disperse the force of the impact over a larger area, minimizing the likelihood of trauma to the skull and brain. Additionally, the cushioning provides comfort and a snug fit, enhancing overall safety by ensuring the helmet stays securely in place during a ride.