Safe, robust and stylish in design - the SONUS MTB helmet is your first choice for action on the bike. No matter what kind of terrain you're heading for: With this helmet from O'Neal, you can rely on a high-quality product! The SONUS has an outer shell made of ABS plastic and thus meets the EN1078 bike helmet safety standards. The comfortable and padded inner lining is removable, sweat-absorbing and washable. Various vents and internal ventilation channels ensure optimised air circulation and the O'Neal Fidlock magnetic closure (developed in Germany) offers maximum safety while riding, as it allows easy, one-handed opening and closing.