Camp Collar (Indigo)Inspired by off duty looks, the camp collar Cantonment Shirt is dyed in deep blue indigo that will age nicely with wear and washes. About Khadi Fabric: Khadi, or hand spun and hand woven cloth, became a symbol of self reliance, economic empowerment, and cultural pride. The Independence movement encouraged Indians to boycott British made textiles and instead produce and wear khadi as a form of nonviolent protest against British economic exploitation.