Meteor KS08 MTR Blue Bicycle Helmet 24910-24911 Properties: outer shell material: PVC absorbent material inside: EPS certificate - product complies with the requirements of Directive 89/686/EEC and the EN 1078 standard helmet dimensions: S circumference 48-42 cm, M circumference 52-56 cm Specification: AIR FLOW system - the ventilation system guides the air flow through the holes in the helmet shell without negatively affecting its stability QUICK-RELEASE system - quick-release buckles FIT SIZE system - headlock multi-stage ring for smooth circumference adjustment removable lining elements - it is easier to keep the sweat-absorbing elements clean as they can be washed and dried efficiently velour lining - exceptionally soft, delicate to the touch, increases comfort of use, does not catch on hair.