Motorcycle Helmet. Size XL Worn once. Stored in cover, indoors in closet. The HJC CS-MX Scourge Helmet features a Polycarbonate Composite Shell that is lightweight, comfortable and has a superior fit with a large eye port for maximum visibility and a great goggle fit. The Advanced Channeling Ventilation System makes for full front to back airflow that flushes heat and humidity up and out. The HJC CS-MX Helmet also features a plush, Nylex interior which is easily removable and washable. Polycarbonate composite shell that is lightweight, superior fit and comfort using advanced CAD technology. Advanced Channeling Ventilation System (ACS): full front to back airflow flushes heat and humidity up and out. Plush, Nylex interior that is removable and washable. Large eye port and maximum visibility and superior goggle fit. D.O.T. approved. For proper fit and size measure the circumference of your head 1 above your eyebrows and around the largest portion of the back of your head. 21 7/8 - 22 1/4 -----Small 22 5/8 - 23 ---------Medium 23 3/8 - 23 3/4 -----Large 24 - 24 1/2 ---------X-Large 25 - 25 1/2 --