Feature：The helmet is a staple for riders of all skill levels. Featuring a multi-port ventilation system for maximum airflow - plus slimmed down design for that lightweight feel you're looking for. Looking great has never been this easy. 【Helmet sizing information】 To achieve proper helmet fitment, begin by finding your head circumference size using the method described below. Remember that the helmet size you choose should fit around the crown of your head comfortably with no pressure points. The cheek pads should fit firmly around your face. Once your chin strap is fastened, grab the helmet's chin bar and move it side to side. Your cheeks should move with the helmet, which should not slide across your face. Different thickness cheek pads can be purchased to obtain the perfect fit. 【Head measurement instructions】 Wrap a flexible tape measure around your head approximately one inch above the eyebrows and ears. Use this measurement (in either inches or centimeters) to find your helmet size in the chart above. 【Specification】 Product Name: motorcycle helmets/helmets for adults motorcycle/full face helmet Material: ABS+PU Leather Features: Adjustable Quick Release Buckle 【Package Included】 1 full face motorcycle helmet