The helmets SK-5, whose outer shell is made with technology CLC (Complex Laminate Construction), is clearly modeled on the GP-5, but is designed specifically for use karting and then provided an opening for the front 'housing visor wider key element in the fierce competition of this kind. The visor 2 D, 3 mm thick and is equipped with aluminum mounting system (typical of Formula 1) and is designed for the use of tear-off lenses. The SK-5 model has a ventilation system consists of a pair of air vents in lockable and-take of extractors Double-Delta Duct2. The interior, washable and extremely comfortable, provide good ventilation to speed typically karting.