DETACHABLE SPONGE The Lamberia bicycle helmet uses a thicker high-density EPS inner shell, which is strong and lightweight, which not only fully protects the child's head, but also improves the wearing comfort. There is a detachable sweat-absorbing lining inside, which is easy to remove and easy to clean to keep it comfortable and tidy. | STURDY AND BREATHABLE The kids helmet adopts a ABS outer shell + high-density EPS foam Inner shell to drastically reduce the impact of collision or fall. The top of it is designed with multiple vents based on aerodynamics and filled with breathable foam, which will reduce the children's sweating and still feel cool during exercise. | ADJUSTABLE SYSTEM There is an adjustable knob on the back of the Lamberia skateboard helmet. When the child feels too tight or too loose, you can turn this button to adjust the size to fit your child's head.The comfortable chin pad prevents scratches, and the safety buckle is easy to remove and put on. |