The chin vent has a round and smooth mesh cap to resist snagging and digging and is easily removable with a single screw, that will breakaway, if necessary, in an impact. The Inner Mud Gate can be easily removed for more airflow. The liner components feature FCS cheek pads that have a larger surface area, wrapping under the jaw for more comfort. The ventilation consists of six upper vents, an upper and lower rear exhaust vent cowl, designed to increase airflow and vacuum exhaust, vents designed to assist holding goggle strap in center position and not slide off, up or down, and an upper rear exhaust vent set designed to accommodate all five shell sizes. DOT Approved. Meets FMVSS 218. The eye port trim and material has molded rubber trim across the top of the eye port. A removable, replaceable, washable neck roll pad, and 5mm peel away cheek pads and temple pads. Standoff ribs that help reduce liner wear from goggles while also providing a small gap for airflow and molded goggle strap guides at either side of the eye port trim. Imported. High Quality