Poc cortex flow helmetpocs cortex flow is a generously ventilated full face helmet with a durable fibreglass outer shell the liner is made of multi impact epp which means that the helmet can withstand numerous impacts the open vents allow more air to flow through the helmet increasing user comfort and functionality the cortex flow helmet features ear chambers that have been designed for less effect on balance and hearing while the chin bar has been constructed for optimised protection and e