Fashion is fickle. The rules are constantly rewritten and reinvented. Colours, fabrics, cuts, styles, silhouettes are discovered and discarded every season. But when designers and trade experts predict the demise of a fabric like denim and with it those swingin' blue jeans, it's time to sit up and take notice. Yes, the news is that denim is dying a slow, ignominious death. The world over, blue jeans - which withstood fashion's diktats for over a century - are suddenly passe. 'Denim is breathing with oxygen cylinders. It awaits resuscitation' says Dr Darlie Koshy, fashion trade analyst at the National Institute of Fashion Technology (nift).