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.