OGK Kabuto Volzza Cycling Helmet"VOLZZA" is equipped with the latest technology inherited from the flagship model "IZANAGI", and which realize "air cooling function" by the excellent air route design , "wearing comfort" that enhances the sense of security by the semi floating structure, and uniform tightening with "BOA fit system" . It is a new middle class racing model that brings comfort beyond the class. Better fitting for round type head shape The shape of a human head varies by