The troy lee a1 drone lid has been primed for aggressive riding this troy lee helmet features a reinforced polycarbonate shell in moulded with the eps liner this extends down the sides and back of the head for maximum impact protection and durability the a1 drone features a race inspired geometry designed to be as aero as it is comfortable this helmet has been kitted out with 8 frontal pressurised intake passages and 8 rear vacuum vortex outlet vents to feed cool air into