Lightness and comfort make the Petzl Meteor Helmet a signature product for climbing and mountaineering. It has large openings for excellent ventilation, with an innovative adjustment system that allows each climber to adjust the helmet to his/her head shape. The METEOR also uses a magnetic buckle, letting you attach the chinstrap using only one hand.Comfortable to wear in all situations - lightweight and comfortable on the head - excellent ventilation - soft headband conforms perfectly to the shape of the head - integrated chinstrap attachment points to reduce thickness - breathable foam lining positioned to stabilise the helmet on the head - chinstrap buckle and headband height are adjustable for a perfect fit - headband folds into the shell for storage and transportationAdapts easily to the activity: - headlamp can be attached using the four integrated clips - Compatible with the VIZION eye shield Weight: 220g Head circumference (size 1): 48-56 cm Material(s): PC shell and expanded polystyrene liner Certification(s): CE EN 12492, UIAA