The fiber can increase airflow but it’s not very absorbent. Coconut fiber adds air pockets into your medium. It’s not quite absorbent, which is good since your growing media requirements air pockets so that you can provide oxygen to the root zone. Coco peat is utilised for a soil conditioner. https://coirdoormat45677.bloggazza.com/36674160/detailed-notes-on-coir-door-mat