The 5.5 pro chest protection system combines an anti-impact 3df airfit foam coating to ensure the optimal protection of your chest, back and lle. 3D articulated design with multiple plates and layers provides excellent fit and comfort. The 3D airfit anti-impact foam is flexible and adapts comfortably to the shape of the body, hardening immediately in the event of an accident to absorb the impact. The zones are made of high density polyethylene (HDPE) for added protection from impact or debris. The chest protection system is compatible with neck brace and is tested and has CE certification. With a total of 15 points on the leatt protection system, the next level of protection is the chest protection system 5.5. Pro HD with 20 points.