Lightweight, compact and comfortable helmet with innovative design and good ventilation thanks to the 10 air vents (with aluminium protective grille) that always keep the head cool. Equipped with simple, effective adjustment mechanism for quick size adjustment via adjustment wheel with rubber coating on the back of the Kask helmet. High density, impact resistant outer shell. Polystyrene foam inner shell with vents for ventilation and air circulation. Equipped with clips on the outside for attaching all standard headlamps, made of high-strength acetal resin.Headband made of soft nylon, attached to the outer shell without the use of metal rivets. Inner padding consisting of headband, visor and forehead, completely removable and hand or machine washable at 30°C. Anti-allergic fabric 2 dry: fresh and breathable, with polyhygiene treatment to inhibit the development of bacteria and bad odours. Straps with four fastening points to better fix the Plasma AQ helmet to the head. Attached to the shell without the use of metal rivets. Closing and opening by quick release buckle in compliance with CE EN 397 standards. Equipped with two lateral devices in soft polyethylene to adjust the strap length and with a ring to attach the helmet to a harness. Can be retrofitted with Kask visors. Compatible with all models of hearing protectors with bayonet closure Peltor and MSA via the appropriate accessories.