Bio-innovation of new-generation nonwoven natural fibrous materials for the footwear industry: Current state-of-the-art and sustainability panorama.

This paper outlines an overview of recent research advances in different production technologies toward sustainable development of nonwoven naturally sourced materials as alternatives to conventional synthetic laminated and bovine leather in the footwear industry. The current state of the footwear industry as a major stakeholder in the fashion sector is discussed, its footprints on the environment, and key developments from nonwoven natural fibrous materials for different footwear components are highlighted. Lastly, the review discusses recent research innovations of naturally sourced fibrous materials as leather alternatives in the footwear sector with special focus on sustainability and material performance. In addition, challenges and limitations in terms of industrial scalability and market potential are outlined. In conclusion, featuring promising nonwoven natural fibrous leather alternatives obtained via up-cycling of agro-wastes using microbes and fungi may be used in the textile and shoe industries. Since the prepared sheets through simple and cost-effective processes visually resemble conventional leather and demonstrate comparable material and tactile properties. [ABSTRACT FROM AUTHOR]