Arai Corsair V Nicky-4 Full Face Helmet - Medium Hyper-Ridge around the bottom enhances shell strength while providing a larger bottom opening Larger bottom opening promotes ease of putting on and taking off the helmet Peripheral belting across the forehead area of the shell enhances structural integrity while maintaining flexibility, low weight and minimal shell size Larger upper vent tabs make operating the vents easier even with thick winter gloves Arai I shield with Super AdSis shield system