The Ballistic RKT-400 Series adventure helmet from Joe Rocket Canada is built with an A.T.P.A. Advanced Thermo-Poly Alloy shell that meets or exceeds ECE 22-06 standards. The helmet fits an intermediate oval head shape and allows for the interchanging of liners and pads within shell sizes. The Dry Tech liners/pads are also moisture wicking to help with sweat management and are completely machine washable. The helmet comes with an integrated chin curtain to reduce wind and the Cross Link ventilation system features several intake vents with two exhaust vents on the back of the helmet for maximum air flow when you need it.