Open face helmets trade full chin coverage for airflow and visibility, and this three quarter shell suits cruiser and commuter riders who want to feel the air without giving up a certified shell. The extra large size covers head circumferences of 24 to 24.4 inches, and construction pairs an Abs outer shell with high density Eps foam that absorbs impact energy across a wide area. Dot approval marks compliance with the federal street standard. A clear visor drops to block wind, dust and insects, then lifts fully clear of the field of view when the road calms down. The uncovered face gives peripheral awareness that a full face design cannot, useful in city traffic where checks over the shoulder happen constantly. Shell weight is only 2.6 pounds so neck fatigue stays low on long days, and the liner detaches for washing. Overall dimensions measure 12.8 by 10 by 9.3 inches.