The HEBO brand Zone 5 Air Montesa Classic helmet has a micrometric security closure. It also has an ABS thermoplastic shell and a double density EPS interior. It is also EU 22-05 certified. In terms of breathability, it has 4 air intake vents (2 front and 2 side) which have a removable cover. It also has 2 rear air vents and 4 holes for perfect hearing. The interior is removable and washable, while the sun visor is retractable and adjustable.Referencia: HC1162BTH