Navitek Airfed Clear Vision Respiratory SystemThe Navitek Clear Visor offers one of the largest clear grinding visors available on the market. The Navitek shell and all its polycarbonates are certified for grinding with the specific standards EN 166B and EN 175B. The visor is made in perfectly clear 1. 0mm thick polycarbonate. The excellent ergonomics provides perfect protection of the forehead, the ears and the neck. The Navitek Clear Visor is equipped with the longitudinal headgear with 4