The Smart Jet. Airoh HPC (High Performance Composite) helmet, ultralight and super ventilated, engineered with 2 shells sizes. It brings first-class ventilation with a unique and distinctive look. Antitheft ring and micrometric buckle make it an easy-to-wear product. It adapts to any journey, passing with ease from asphalt to dirt roads. The top choice for the modern rider. Features Shell: HPC (High performance composite) 2 Shell sizes: 1° XS-S-M, 2° L-XL-XXL Weight: from 850 gr. ± 50 gr. Homologation ECE 22-05 Retention system Micrometric buckle Ventilation Top vents Rear vents Side extractors Inner lining Removable and washable, hypoallergenic inner lining In the box Clear vent covers Air vents Optimized ventilation system for internal cooling. Clear covers for the air vents to decrease humidity. Materials HPC (High performance composite) shell and other quality materials to minimize weight and maximize protection. Note Please note that as long as nothing else is written in the article description, all helmets that have a visor as standard will be delivered with a clear one, even if it s shown differently.