Two-piece channeled Dual-Density lightweight EPS liner. Large eyeport opening for greater visibility. Unique CAD generated shell sculpture (with 2 shell sizes) for improved fit and increased helmet stability. Bottom edge wind deflector offers reduced air intake to the facial area and an additional level of turbulence reduction. Two multi-stage forward intake vents and a large integrated rear exhaust spoiler combined with sculptured air channels to act as a full venturi exhaust system. Chin bar and rear venturi exhaust vents for increased head and humidity dissipation. Cheek pads and upper liner are easily removable to allow for cleaning. DOT-218, Snell-M2005.