A selvedge end prevents the edge of the denim from unraveling and shows a clean, finished look. The Selvedge is the narrow and tightly woven belt on both sides of the fabric of denim. Selvedge denim is made out of denim woven on an old-style shuttle loom with a continuous weft and a narrow width (usually around thirty inches), the edge unlike modern loom fabric is sealed with white and red (or sometime green or yello) thread which gives fabric a self edge also called selvedge or salvage.