Almost everything in between the shell along with the outer coating with the coconut seed is considered coco coir. There are 2 types of fibers that make up coir—brown and white. Coco fibre can harbor organisms that pose a menace towards the biosecurity of countries into which it is imported. https://coirmatcuttosize91122.thelateblog.com/38239531/rumored-buzz-on-coir-matting