What does „selvage“ mean?

Denims with an woven selvage edge do not fray. The edge is found on the inside of a pair of jeans and is considered a quality feature of particularly high-quality jeans. It is usually finished with a coloured thread. This selvage edge is the feature of the original shuttle looms, which weave this selvage edge as the end of the fabric at the width of approx. 90cm.