Kapok Blend Cap - Indigo BlueA classic cap made using natural kapok fibre. By using a fabric that mixes kapok with cotton, it is softer and lighter than conventional 100% cotton. Has an adjustable strap for a comfortable fit. [What is Kapok]The fibre harvested from kapok nuts is a material with minimal environmental impact that can be cultivated with little fertilizer and water without pesticides. Because the fibre inside is hollow, it is light and contains a lot of air.