What is cashmere?

(dead link) What is cashmere? (http://timesofindia.feedsportal.com/c/33039/f/533933/s/148800dd/l/0Ltimesofindia0Bindiatimes0N0Chome0Csunday0Etoi0Copen0Espace0CWhat0Eis0Ecashmere0Carticleshow0C81319340Bcms/story01.htm)