To Elizabethan costumers, trunk hose means something totally different. Here it refers to the part of the steampunk gas mask which resembles an elephant's trunk, and consists of a vacuum cleaner hose covered with leather. The top picture shows the before and after. I chose lambskin for the leather as it is very fine, and conforms readily to what it's wrapped around. I put the suede side showing, as it seemed more 19th century to me. The leather was stitched onto the hose, then wrapped along its length with waxed thread. One end of the hose will attach to the leather mask, and the other to a pressure gauge.