Giro Source Mips Helmet Matte Black MAAP and mountain bike tyresDurable construction Variant:32.0mm and mountain bike tyresDurable construction – Built for frequent useEfficient air delivery – Enables quick tyre inflation Delphin protect you and improve aerodynamics Integrated MIPS® Brain Protection System: All Giro helmets are designed to reduce as much energy as possible while meeting and exceeding stringent safety standards The goal of Giro's Integrated Mips® equipped helmets is to reduce rotational forces while enhancing fit and comfort by combining the Mips slip plane with the helmet's adjustable fit system