We engineer the Capstone Sun Shield H24 Modular Helmet with essential comfort-focused qualities. Like better venting to keep it cool inside. And a washable liner that wicks moisture and battles bacteria. To finish it off, this modular motorcycle helmet is Boom!?ö?ñ?? Audio 20S Bluetooth® compatible and includes a glare-fighting retractable Sun Shield. For all the specs, read on... Average Weight: 3 lbs. 13 oz. or 1,730 grams. Helmet Construction: Advanced polycarbonate composite shell. Double D-ring chin strap. Stay Cool: Advanced Channel Ventilation System for full front-to-back airflow to help flush out heat and humidity. Interior & Linings: SuperCool® moisture-wicking, anti-bacterial interior liner is removable and washable. Compatible with BOOM!?ö?ñ?? Audio 20S Bluetooth® Helmet Headset. Ride Enhancing Features: Retractable sun shield deploys quickly and easily. Face shield features 95% UV protection, anti-scratch coating, and uses the QuickSlide?ö?ñ?? shield replacement system for quick, secure, tool-free removal and installation. Other Features: Helmet bag included. Manufacturer : HJC. Certification: Meets ECE & DOT safety standard FMVSS 218.