Arai A20 Defiant-X Solid Mens Motorcycle Helmets Aggressive styling that projects the strength within. Arai's PB-cLc shell and one-piece, multi-density EPS liner deliver unparalleled protection. Mouth vent with internal shutter enhances the strong shell design. The Defiant-X comes standard with a VAS Max Vision faceshield to provide better visibility in all seasons and for all types of riding. The VAS shield is smaller and lower than the previous design with adjustable air intake vents that provide improved sealing, which decreases road noise and water intrusion.