Super-Lightweight ACM Shell Construction. ACM (Advanced Composite Material) Shell constructed using advanced fiberglass & Spectra composite weave. Two-piece channeled Dual-Density EPS liner. Large eye port opening for greater visibility. Two shell sizes for a more comfortable fit. Flow-Through ACS Advanced Channeling Ventilation System. Dual flow-through channels. 2 high capacity, multi-stage, forehead intake vents. Rear venturi exhaust spoiler and 2 lower exhaust vents. Anti-Fog System. Side chin bar mounted vortex vents create a low-pressure vacuum effect drawing heat and moisture out of the face shield area. Adjustable chin vent re-directs air upward and across shield interior. Anti-fog treated 3D shield. Removable AquaTrans Open Cell Interior Liner. Easily removable liner and cheek pads for cleaning or custom fitting. AquaTrans interior material quickly wicks moisture away from the skin. Open Cell technology foam allows for increased internal air circulation. Streamline, wrap-around neck roll reduces wind noise. Padded chin strap design. Nylon strap retention snap. Neatly secures excess chin strap. Next Generation, 2 Stage Compression Shield Closure System. A two-stage pivot mechanism, compresses the shield into the eye port gasket providing an extremely secure seal. Improved, no guess work, tool-less shield removal and installation. Aerodynamic flush mounted fit for reduced turbulence. Scratch resistant hard coated shield. Optically superior 3D design. Rated at 95 percent UV resistant. Built-in Communication System Speaker Cavity. Soft Textile Helmet Storage Bag Included. Standards: Dot-218, Snell M-2005. Construction: (ACM) Fiberglass and Spectra. Weight: 1600 grams (approximate based on size medium solid color).