SoldCrazy Outdoor Cycling Mountain Helmet for Kid/Adult 21 holes unique design with breathable and comfortable. Ventilation design, scientific and reasonable hole position, good heat dissipation effect. The product is a multi purpose bicycle helmet and it can be used for mountain bike, road bike, etc. Imported EPS foam can reduce impact damage to the maximum. Using high-grade imported PC material, not easy to fade. The design of the wind tunnel can effectly reduce the wind resistance. Lined with breathable mesh / velvet, safe and comfortable to wear.