Complex sentence: Mineral wool, mineral fibres, or man-made mineral fibres are fibres made from natural or synthetic minerals The latter term is generally used to refer solely to synthetic materials including fibreglass, ceramic fibres and stone wool.
Split into simpler sentences: Mineral wool, mineral fibres, or man-made mineral fibres are fibres made from natural or synthetic minerals. The term "man-made mineral fibres" is generally used to refer solely to synthetic materials including fibreglass, ceramic fibres and stone wool.