Coir, also called coconut fiber, is a natural fiber extracted from the outer husk of coconut and used in products such as floor mats, doormats, brushes, and mattresses. Coir is the fibrous material found between the hard, internal shell and the outer coat of a coconut. Other uses of brown coir (made from ripe coconut) are in upholstery padding, sacking, and horticulture. White coir, harvested from unripe coconuts, is used for making finer brushes, string, rope, and fishing nets. It has the advantage of not sinking, so can be used for long lengths in deep water without the added weight of dragging down boats and buoys.