Smart HJC 10B by Sena Pre-Installed, Charged and Tested. The HJC i10 Motorcycle Helmet offers an Advanced Polycarbonate Compact Shell: Lightweight, superior fit and comfort using advanced CAD technology. The HJ-31 Optically superior anti-fog lens prepared 3D face Shield: Provides 95% UV protection. The retention system is a D-Ring with adjustable chin strap. Glasses Groove can accommodate riders who wear glasses. RapidFire Shield Replacement System: Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation for efficient operation. D.O.T. And Snell 2020 Approved for sizes up to 2XL. Size 3XL isD.O.T. Approved and Meets FMVSS 218 Standards.