This book covers all sustainable fibres applicable in the fashion sector. It addresses the importance of these fibres in the fashion sector with the context of sustainability. This book, the first of its kind, addresses all the minute details pertaining to these fibres and connects these fibres with the world of sustainable fashion. It stresses the importance of having these fibres on board in developing sustainable apparels, as fibres play a major role as the starting point in the life cycle of apparel.