Arai has made the Tour-X 4 to be an adventure helmet that can tackle any condition no matter how extreme. The outer shell has been redesigned to be stronger and tougher. The Super fibre laminate construction of the outer shell works alongside the triple density inner shell to protect against impacts and shock. This is invaluable for when riding off-road where falling is a big risk due to the bad terrain. Arai’s hyper ridge that reinforces the bottom of the shell for added strength and rigidity.