Coconut fibre, often known as coir, can be a normal fibre derived with the outer husk of coconuts. This fibrous substance has a protracted history of use because of its strength Badly sourced coco fibre can have surplus salts in it and needs washing (Look at electrical conductivity of run-off https://coirmat12344.ageeksblog.com/36358144/getting-my-coir-mat-to-work