"HJC offers you its modular helmet C91 - Safety: In composite polycarbonate for a weight of 1700 g +/50 Quick and efficient micrometric buckle closure of the chin strap. Modularity: 90° sliding chin guard opening. Lever opening system easy to use with gloves. Visibility: clear screen HJ-17 Predisposed to a pinlock film. In the integrated V7 Scratch Resistant Screens Easy and secure RapidFire system for ultra-fast, tool-free display changes "ACS" Ventilation: 1 large upper ventilation 1 chin guard ventilation The "+": Fully removable and washable interior Moisture-wicking antibacterial Super Cool interior grooves for easy insertion of your glasses Compatible with the SMART HJC 20B or 10 Bluetooth communication system B Homologué ECE 22.05 XS 53/54 cm S 55/56 cm M 57/58 cm L 59/60 cm XL 61/62 cm XXL 63/64 cm