Palm fibre (sea grass)
Zostera marina has found use as a substitute for horse hair in Europe and the USA, as a material for stuffing pillows, mattresses and upholstery.
One of the major beneficial properties of seagrass as insulation was that it was non-flammable, because of its high silicon content. A popular form of insulation in the United States was something called a Cabot's quilt, named after its inventor. This was a mat of dried seagrass material, i nserted into the walls of houses. The material was also used to sound-proof radio studios in the USA and the UK.
Also included in the mattresses is seaweed, which Coco-Mat gets pretty much for nothing from the nearby Aegean, and horsehair, both of which are believed by some to have health benefits.
Seaweed is used to provide extra iodine to people with ashma and breathing problems