The Petzl Meteor???s innovative adjustment system lets each climber to adjust his or her helmet to their head shape for a customized fit. Large openings provide excellent ventilation, and a magnetic buckle allows the chinstrap to be attached with one hand. . . . Soft headband conforms to the shape of the head. . Excellent ventilation. . Comfortable and breathable foam lining is positioned to stabilize the helmet on the head. . One-handed chin strap attachment. . 3342540103184 27882900036 A71BH2