When we're out on all-day trail missions or pre-riding the enduro course, we don't want to feel limited by our helmet choice. The removable chin bar of the Leatt MTB Enduro 2. 0 Helmet lets us decide between a half shell and a full face so we can stay cool on the climbs and protected as we speed downhill. 360° Turbine Technology reduces both peak brain linear and rotational acceleration on impact to help diffuse force in the event we have a gnarly crash.