"ACM" (Advanced Composite Material) Shell Shell constructed using advanced fiberglass & Spectra® composite weave. I-beam chin bar design. Three shell sizes for a more comfortable fit. Flow-Through "ACS" Advanced Channeling Ventilation System. Dual flow-through channels. 2 high capacity forehead intake vents. 2 venturi exhaust vents. 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. Padded chin strap design. Aerodynamic Visor Design. Adjustable 3-screw "ram-air" visor with machined aluminum side and plastic center screws. Integrated visor fins to reduce high speed lift. Visor matches helmet graphics. Large Eyeport. Large eye port opening for greater visibility. Integrated non-slip goggle strap holders on each side of the eye port. Nylon strap retention snap. Neatly secures excess chin strap. Soft Helmet Storage Bag Included. Standards: Dot-218, Snell-M-2005. Construction: (ACM) Fiberglass and Spectra®. Weight: 1570 grams (approximate based on size medium solid color).