Polyethylene helmet shell with 3 adjustable ventilation slits. Adjustable inner headband from 52-61 cm with ratchet adjustment. Can be used at extremely low temperatures according to EN 397es. Excellent comfort with ventilation over a large surface area (300 mm2): one row of vents at the front and two rows at the back, which can be closed separately. Quick-adjustment textile helmet basket suspended at 6 points for infinitely variable adjustment to the user's perfect circumference (52-61 cm). Replaceable, hygienic sweatband running the full length of the basket. Can be used between 30C and +50C with unchanged shock absorbing properties. Fitted with hearing and face protectors, integrated gogg