In independent tests performed on dryer exhaust hoses, DryerFlex outperforms the others with its unique design. Made of all metal construction, DryerFlex utilizes five layers of 25 micron aluminum ribbon wound over galvanized, zinc-coated wire.
To protect metal from corrosion, it is "galvanized". This method is widely used and it consists of a thin coat of zinc applied to a thick base metal. This shields the underlying metal from the outside elements. This outer layer is a matte silver color. Without this layer, metal is prone to faster oxidization and corrosion.