The bell volt rl road bike helmet has been loaded with 22 vents for maximum ventilation however the vents aren39t the only reason this helmet has a cool comfortable feel on the road the design of the vents pull in the cool air direct it through the internal streamjet ventilation channels and over your head then the rear exhaust ports pull out the warm air so you get a consistent cooling effect the helmet has been constructed from an in mould polycarbonate shell for high protection