Lightweight, compact, and comfortable helmet with innovative design and good ventilation thanks to the 10 air vents with aluminum protective mesh that keep the head cool at all times. Equipped with a simple, effective adjustment mechanism for quick size adjustment via a rubber-coated adjustment wheel on the back of the Kask helmet. High-density, impact-resistant outer shell. Inner shell made of polystyrene foam with openings for ventilation and air circulation. Fitted with clips on the outside for attaching all standard headlamps made of high-strength acetal resin. Soft nylon headband, attached to the outer shell without the use of metal rivets. Inner padding consisting of headband, visor, and forehead section, completely removable and washable by hand or machine at 30°C. Antiallergic fabric 2 dry: fresh and breathable, with Polyhygiene treatment to inhibit bacterial growth and unpleasant odors. Straps with four attachment points for better fixation of the Plasma AQ helmet on the head. Attached without the use of metal rivets on the shell. Fastening and opening via a quick-release mechanism in accordance with CE EN 397 standards. Equipped with two lateral devices made of soft polyethylene for adjusting the strap length and with a ring for securing the helmet to a belt. Retrofit with Kask visors is possible. Compatible with all hearing protection models with bayonet connection Peltor and MSA through the corresponding accessories.