Features: Impacts Resistance:This bike helmet is specially designed for adult. Material of thickened multi-density EPS foam inside helmet absorb impacts energy effectively to minimize the risk of harms to head in crash, and extended rear shaped guarantees full protection to cranial part of head. Lightweight and Ventilation:This biking helmet made of lightweight material, the inner pad use of breathable material to wear comfortably.The adoption of specialized aerodynamic and ventilation design allow air go through the biking helmet which help increase the speed and keep stay cool. Can Adjustable To Different Head Size: Ddial retention system is easy to adjust and secure the cycling helmet great fit on your head, It is very important for you to get helmet on head properly because potential dangers occurs easily with small or big size helmet. please measure your head circumference correctly before purchase, This helmet fits head circumferences 56-62cm. Uses:After wearing the helmet, it can act as a buffer, prevent collisions, prevent branches and leaves from hitting. Durable:High quality material with strong resistance to compression and durability.The integrated molding helmet has better impacts resistance and greater strength. Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Material: EPS Head circumferences:56-62cm Package List: 1x Bike Helmet