Swing doors are the ideal solution when a "hands free, " self-closing pedestrian door is required. These doors offer better sealing and less interference with traffic than a strip curtain. The see-through leaves provide excellent vision, meaning busy two-way traffic can be accommodated without the risk of collision. Doors are either single or double-leaf, depending on the width of the opening and work best when the width of the traffic passing through them does not exceed 23rds of the width of the opening. Doors with flexible PVC leaves and rigid polycarbonate leaves are available. PVC leaved models are quieter and more forgiving on the traffic, while polycarbonate models are better suited to abrasive traffic and situations where wind and or security are factors.