ABUS CliffHanger MTB helmet bike for demanding trails with large ventilation openings & TriVider strap system men and women grey, size M

[MULTI-SHELL IN-MOLD] manufacturing process that creates a durable bond between the shock-absorbing EPS inner shell and several impact-resistant outer shells [FIT] Zoom Ace MTB adjustment system with an adjustment wheel allows individual adjustment to the wearer's head circumference - adjustment wheel is even height-adjustable [ACTICAGE] "Cage" (ActiCage) integrated in the hard foam reinforces the helmet structure - the cage architecture provides more space for large ventilation openings [DETAILS] Unisex mountain bike helmet for adults, including a height-adjustable peak - size in centimetres corresponds to the wearer's head circumference [TRIVIDER] flat strap distributor, which is not height-adjustable - however, it can be used to move the strap sideways (to the right or left) to adjust it to the position of the ear