The Protone offers the optimal combination of aerodynamics and cooling. Thanks to its Octofit adjustment system and divider earband you can adjust your Protone easily, quickly, and precisely for a perfect fit. Because of its eco-leather strap it is is very comfortable and prevents irritation on the skin. This strap is washable just like the helmet pads. Thanks to these features the Protone is the helmet perfect for both competitive professionals and the stylish touring riders.