Lightweight. This Bicycle Helmet is Made of Lightweight Material. the Inner Cushion is Made of Breathable Material. It is Comfortable to Wear & Light in Weight, Reducing the Burden on the Wearer. Impact Resistance. This Bicycle Helmet is Designed for Adult Riders. the Material Uses Tough & Durable PC, Eps Foam, Which Helps to Reduce Impact & Protect the Head During Collision Adjustable Size. This Adult Cycling Helmet Comes in Standard Size with an Easy-to-use Head Circumference Adjuster & Adjustable Side Straps That Allow the Helmet to be Adjusted to Different Head Sizes for Men & Ladies; Ventilation. Professional Aerodynamic & Ventilated Design That Allows Air to Pass Through the Bicycle Helmet, Helping to Increase Speed & Stay Cool. Minimum Quantity: 1