The Wide Vison System (WVS) combines Roll off / Tear off system for maximum vision clearance. This includes a quality Lexan impact resistant Lens, which has an anti-scratch outer coating and an anti-fog inner coating. The lens has raised strips to reduce film tension and 48mm roll off canisters with built in tear off fittings. The 48mm WVS is the largest roll of vision on the market and the longest, each film is a minimum of 8m long.