EASY TO SWITCH BETWEEN FULL AND HALF HELMETS: The removable chain guard and visor allow the helmet to easily switch between half and full face helmets to suit your different needs. RESISTANCE AND IMPACT PROTECTION: This bicycle helmet is designed for adult cyclists. The helmet features an construction with a rigid polycarbonate shell and EPS liner that effectively absorbs impact energy, minimizing the risk of head injuries upon impact, and the elongated rear shape protects completely the head. GOOD VENTILATION: This bike helmet is made of lightweight material, the inner pad is made of breathable material, 18 vents ensure good ventilation, remove excess heat and keep you cool and comfortable. 🗹ADJUSTABLE: This bicycle helmet can adjust the head circumference to fit different head sizes, and the internal rotating adjuster can adjust the tightness of the helmet. Dial system: 54-61 cm. GOGGLES HOLDER: The camera port and glasses port allow you to mount the camera and glasses on the helmet, which can prevent debris from floating into the eyes during riding, protect the eyes and ensure speed of conduction. NOTE:Due to different head shapes, heads that appear to be the same size when measured with a tape measure may not necessarily fit the same size adult helmet. This is only a rough guide, there will be differences in different head shapes, and this step alone may not provide perfect fit Size One Size Color Black Athlete cycling Brand Name Lixada Model Name Lixada Cycling Helmet Item Weight 1.1 Pounds Manufacturer Lixada Inner Material Expanded Polystyrene Outer Material Polycarbonate (PC) Additional Features Ventilation, Visor Age Range Description Adult Recommended Uses For Product Cycling