Riding helmets with polycarbonate exterior, material used in motorcycle helmets. Covered with matte anti scratch paint. The internal housing is made of polystyrene of variable density that provides a better dispersion of the energy produced by the impacts. The interior has a foam with memory that ensures a constant thickness over the years of use. The interior provides stability in cases of violent movements. It can be disassembled to wash it or change it when it deteriorates. It has a perfect fit to the size of the head with 3 sizes of housing available and 4 to 5 sizes of interior pads for a perfect fit. This makes it ideal for adapting the helmet to the growth of a young rider. These helmets have an efficient internal ventilation system. Light and stylish Includes pad. Include your pad size in the comments at the time of purchase. Choose your pad size in product reviews (when you make the purchase).