Following on from the bestselling O'Neal Sierra helmet, the O'Neal Sierra 2 V23 Slingshot Adventure motocross helmet has brought all the same features with improvements! ECE 22.06 certified, it boasts a high-grade and lightweight aerodynamic moulded ABS shell in an aggressive, streamlined aerodynamic shape. The ultra-plush removable, sweat-absorbing and washable padded inner liner keeps you cool and dry by wicking away sweat for maximum comfort. It also offers recesses for intercom systems (sold separately) for easy integration with minimum disruption. A sophisticated ventilation system with 17 adjustable air inlet vents and exhausts for optimal ventilation and cooling. The clear anti-scratch visor provides perfect vision and this comes with a Pinlock 30 fog-resistant insert lens and an integrated inner sun visor with easy to use lever. The peak is adjustable and lightweight. The Microlock closure is ultra-secure and adjustable for the perfect fit - a feature carried on from the original Sierra helmet. A wide choice of colours are also available.