The 710X features three shell sizes with Ram Air ventilation. The visor, shell and dual density EPS work in harmony providing maximum air flow through the helmet. The shell was engineered with an enlarged eyeport and a contoured bottom to prevent injury. Quick-snap chin vent makes removing the chin vent easy for cleaning, no tools required. The visor also features EZ-turn screws to make changing the visor fast and easy. Advanced ThermoPoly Shell Removable/Washable 3M Scotchguard moisture-wicking liner Dual-layer EPS and chin bar Ram Air Ventilation system Quick-snap removable chin vent EZ-removable visor Neck brace contour Enlarged eyeport Adjustable peak EZ-fit for eyeglasses Winter breath guard available Dual Homologation D.O.T and ECE-22.05