【DOT Approved Motorcycle Helmets】ABS shell and multi-density EPS material. This A8 motorcycle helmet has a high safety factor, is DOT approved and meets FMVSS 218 standards 【Ventilation & Heat Dissipation】Multiple vents on the full face motorcycle helmet for optimal ventilation and heat dissipation. The aerodynamically designed shell of the racing motorcycle helmet can reduce wind noise effectively 【Dual Visor Full Face Helmet】Outer clear visor and inner black sun shield design, it is windproof, dust proof, anti-scratch and UV Protected 【Convenient and Fast】Quick release chin strap for easy use. The lining of biker helmets for adults is removable, washable, comfortable and breathable 【Adult Size Street Bike Helmets】Our motorbike motorcycle helmets for men provide Adult S/ M/ L/ XL/ XXL 5 sizes. If you have a larger head circumference or your cheeks are a little chubby, please size up JQF Gear Motorcycle Full Face Dual Visor Helmets for Adults — A8 Street Bike Racing Motorbike Helmet DOT Approved About Helmets For Adults: Full face helmets motorcycle suit ATV, motocross, street bike, dirt bike, motorcycle, mountain bike, touring, dual sports and other outdoor riding activities. - Helmet Model: JQF Gear A8 street bike helmet - Dual Visor : Outer clear visor and inner black sun shield design - Material: Lightweight ABS shell and Multi-Density EPS material for safe riding. - Quick release chin strap:The quick release chin strap design is easy and quick to use. - Removeable Lining: The lining of the cascos para motos para hombre are removable, washable and replaceable for comfort and breathability. - Ventilation & Heat Dissipation: Multiple vents on the full face motorcycle helmet for optimal ventilation and heat dissipation. The aerodynamically designed shell of the racing motorcycle helmet can reduce wind noise effectively. - Adult Size: Adult-S: 55-56 CM/ 21-5/8 - 22 inch Adult-M: 57-58 CM/ 22-1/2 - 22-7/8 inch Adult-L: 59-60 CM/ 23-1/4 - 23-5/8 inch Adult-XL: 61-62 CM/ 24 - 24-3/8 inch Adult-XXL: 63-64 CM/ 24-3/4 - 25-1/4 inch If you have a larger head circumference or your cheeks are a little chubby, please size up. For Customer: If you have any questions or product problems when receive our motorcycle helmets, please feel free to contact JQF Gear. We will contact you and help to solve in 24 hours.