Abstract: The invention is directed to an insulation composition comprising the following layers (a) a hydrophobic, moisture permeable layer composed of a woven, non-woven, or knit fibrous material, (b) a hydrophilic wicking layer, (c) an insulation material layer. The invention is also directed to a method to remove water from an insulated metal transport conduit comprising a metal transport conduit and an insulation composition, wherein the insulation composition comprises of a layer (b1) of a high void material, by supplying a stream of gas to the layer of high void material at a first point and discharging a stream of the gas and any water picked up from the high void material at a second point.

Abstract: The invention is directed to an insulation composition comprising the following layers (a) a hydrophobic, moisture permeable layer composed of a woven, non-woven, or knit fibrous material, (b) a hydrophilic wicking layer, (c) an insulation material layer. The invention is also directed to a method to remove water from an insulated metal transport conduit comprising a metal transport conduit and an insulation composition, wherein the insulation composition comprises of a layer (b1) of a high void material, by supplying a stream of gas to the layer of high void material at a first point and discharging a stream of the gas and any water picked up from the high void material at a second point.