Closed handguard with quick attachment to the handlebar. Extendable upper cover for maximum protection from the air, useful for use at low temperatures. Extensible bottom cover directs the flow of air to the hands for maximum aeration. Innovative design for improved aerodynamic efficiency. Steel bar over-molded with plastic in different colors. Metal mounting kit reduces vibrations, designed for mounting many on / off-road and naked motorcycles (optional kits available for application on motorcycles that require dedicated assemblies).