Zacro adult bike helmet is well-constructed with integrated polycarbonate solid PC shell and high density shock-absorbing EPS foam material, giving it excellent shock absorption and drop resistance ability, thus can reduce impact force effectively and provide you the most reliable safety. Featuring the special aerodynamic design, 18 vents make air ventilated, keeping your head cool and dry during high heat conditions. In addition, our cycling bike helmet is ultra-light design, which ensures less pressure on your head even for a longer duration of wearing. Our men and women bike helmets feature high-quality wrap-around moisture-wicking linings to keep you sweat-free on hot summer commutes. Lightweight, breathable and comfortable, suitable for urban commuting, cycling, scooter riding. The sun visor comes with the adult bike helmet can be removed easily, it help to keep sun out of your eyes and avoids rain into the eyes during cycling. Detachable inner pads is for added comfort and easy to clean, which strengthens internal construction and makes sure your head all wrapped in safe and breathable condition. Adjustable dial system and side straps allows the bike helmet can accommodate heads of various sizes, suits for most teens and adults. Suggested head circumference: 54-62CM (Please measure your head before purchase.) You will get 1 x Bike Helmet(Black), 1x sun visor, 1 x wide headband and 1 x user manual.