Minwool Rock Fibres Limited offers Lightly Bonded Mattresses with Fine Fibres. Minwool Rock Fibres Limited manufactures Rock Wool or for Thermal Insulation [Hot and Cold] and Acoustic Insulation, Mineral Fibre Ceiling Tiles. The Lightly Bonded Mattresses with Fine Fibres are spun from selected rocks melted at high temperatures and bonded with a thermosetting resin. The Lightly Bonded Mattresses with Fine Fibres are the felted in a predetermined fibre lay pattern and are baked to form preformed mattresses of predetermined density and thickness with uniform fibre distribution.