Two layer wings for double tanks. Use for doubles from 2x6 to 2x20L. These wings are very easily manageable and are very durable and long lasting. Its entire construction was designed with regard to the experience from the roughest environment of cave diving hence it offers unmatched ratio of price and performance to all divers. These wings has proved its quality during the most demanding descents of the Czech speleodivers either abroad or in the Moravian karst.