Our LRB Mattress or Rock Wool Lightly Resin Bonded Mattresses consists of fine Fibers Spun, obtained from selected rocks melted at high temperature and bonded with a thermosetting resin. They are Machine laid fiber lay pattern and are baked to form LRB Mattress of predetermined density and thickness. The LRB Mattress is then slit and stitched to specified dimensions. Our LRB Mattress imparts controlled thickness and density resulting in predictable heat losses. Available In Various sizes Features Long lastingControlled heat lossEfficientCost effective