Espestos, or asbestos, is a group of naturally occurring minerals known for their fibrous structure and heat-resistant properties. It was commonly used in construction materials, insulation, and fireproofing products due to its durability and resistance to heat and chemicals. However, asbestos is now widely recognized as a serious health hazard, as inhalation of its fibers can lead to respiratory diseases, including lung cancer and mesothelioma. Consequently, its use has been heavily regulated or banned in many countries.