hjc i10 full face helmet snell 2020 with sena smart hjc bluetooth headset taze mc4sf small hjc helmets 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.