The Sierra by O'neal is a motocross helmet, which is only suitable for off-road riding on dirt.

It is made from composite fibre, which means synthetic fibers that make it flexible and resistant to shock absorption.

The built-in wireless Bluetooth connection allows you to connect devices that have the same technology, such as a mobile phone. This way, you can answer a call, listen to music, or even get directions from the GPS.

If the passenger also has a similar helmet, you can use Bluetooth for intercom, meaning you can talk to each other.

The helmet has the new European safety standards certification "ECE 22.06", which ensures that the helmet is tested at 18 impact control points instead of the previous 6.