Coir Fibre Coir, seed-hair fibre obtained from the outer shell, or husk, of the coconut with or without retting. They are resistant to abrasion and can be dyed. They are used to make brushes, are woven into matting, and are spun into yarns for marine cordage and fishnets. There are two types of coir: the more commonly used brown fibre, which is obtained from mature coconuts, and finer white fibre, which is extracted from immature green coconuts after soaking for up to 10 months. Mature coir fibres contain more lignin, a complex woody chemical, and less cellulose than fibres such as flax or cotton.