Description: 1. Safety Protection: (CE EN1078) BOLANY Adult Cycling Helmet is made of durable and tough PC shell, high density EPS foam, which can absorb the impact of shock, avoid neck sprain and protect the head while riding. 2. HEAD SIZE: This cycling helmet is for adults only - (58-62cm); for a perfect fit, please measure your head circumference from the middle of your forehead to ensure you choose the correct size. 3. ADJUSTABLE SIZE: This adult cycling helmet comes in standard size - adult size with adjustable swivel adjusters, adjustable shoulder straps and side buckles so you can adjust it to fit your head perfectly. 4. AWESOME VENTILATION SYSTEM: BOLANY helmets are designed with 12 integrated vents to reduce drag. At the same time, it can also take away excess heat and water vapor while riding, ensuring the head is breathable and comfortable. 5. Cool appearance: The perfect fusion of two colors, more delicate and colorful, cool appearance, like a mecha warrior, on the premise of protecting the head, you can also enjoy the fun of riding.