About size-: S code 52-53CM, M code is 54-55CM, L code is 56-57CM, XL code is 58-59CM - please read the size measurement scheme on the picture carefully (very important) High-quality materials-: ABS + EPS engineering plastics, A robust, lightweight DOT shell designed strong impact resistance, good stability, can absorb collision energy, effectively relieve head impact and protect your safety. Ventilation system-: Optimal Aerodynamically designed adjustable intake and exhaust ports, optimal air circulation for a comfortable driving experience, clear vision and cool head. Unique 3D molded face shield designed to ensure a distortion-free view throughout the entire field of vision. Comfort pad-: Fully detachable and washable pad to keep the helmet clean, fresh and odor free. -Yes, we give you free of charge: off-road gloves / goggles / Face protection. riders instant relief from sun glare in one motion. Professional motorcycle helmet-: exciting fashion design, UV coating. With many advanced features: double sunshade system, quick release buckle, reinforced strap, to meet your needs for motorcycles, racing cars, ATVs, off-road vehicles, Demand for motocross, etc.