Which cloth?
Woven polyester
hough technology has advanced, the basic principles of weaving sailcloth haven’t changed since sailing began, with warp fibres (which run along the cloth) being bent around fill fibres (which run across the cloth). The yarns have to snake over and under each other, and this is called ‘crimp’. When the cloth is loaded, these yarns straighten, resulting in stretch. Most woven sails are made from polyester (also called Dacron, a DuPont trade name) that was introduced
