When 100% natural mattress fibre or mixed fibre and an amount of bristle fibre are twisted using a machine you get Machine Twisted Fibre (FMT / Feherer Machine Twisted Fibre)
It is manufactured with natural brow coir from coconut husks with right maturity. They come in 20 kg coils, 50kg coils or 100kg coils and in other weights according to customer needs.