Protective Cap. A Swedish firm has produced this protective headgear for motor cyclists. It is made of flexible "Plexiglass," and worn with the opening in front of the head, so that when travelling the air is compressed as much as possible inside the funnel-shape headpiece. The air inside the "funnel" remains still throughout the journey, and the air "cushion" inside force all foreign objects out. The device also keeps the head warm. November 22, 1950. (Photo by Paul Popper Ltd.).