The anal sphincters, along with the pelvic muscles that surround the end of the digestive tract, ensure controlled movement of digestive tract contents. There are many possible causes of fecal incontinence; in most cases, incontinence results from some combination of these causes. Critical to normal bowel function are:
Oilcloth is a tightly woven fabric, usually cotton or linen, which is then treated on one side to give it a waterproof finish. The coating traditionally was linseed oil, but is now more commercially sold with a PVC coating.
Image by Flickr.com, courtesy of Hans Kylberg. Duck cloth is a heavy fabric commonly referred to as canvas. It's usually made of cotton--which is also called canvas duck or just duck--but linen duck, made from flax, is available.he name duck comes from the Dutch doek, a linen cloth. All canvas was once made from hemp, so this different name was adopted for cotton and linen versions.