Researchers developed an eco-friendly insulation material using mushroom mycelium (Ganoderma lucidum) combined with waste plant materials from Colombia: Arboloco pith and grass clippings. The resulting material is lightweight, thermally efficient, and comparable to commercial insulators like expanded polystyrene. However, the material shrinks significantly and absorbs water when exposed to moisture, so additional treatments are needed before it can be widely used in buildings.