C50 Mecha Beast Off-Road Helmet. Advanced Polycarbonate Compound (APC) shell. "ACS" Advanced Channeling Ventilation System. Optimized peak visor has been wind tunnel tested and fine-tuned using advanced CFD (Computational Fluid Dynamics) programs. Tool-less Peak Visor - Fasten and Remove with hands. BCS (Bespoke Contour System) fitting. Moisture-wicking and quick drying interior. Interior includes grooves to accommodate eyeglasses. Removable and washable crown and cheekpads. Double-D ring chinstrap. Interchangeable cheekpads throughout all sizes. Universal Bluetooth communication compatibility (system sold separately). Standards: DOT FMVSS NO.218 and ECE 22.06. Construction: Advanced Polycarbonate Compound. Weight: 3.315 pounds / 1521 grams (approximately, based on size medium solid color).