According to the search results, some mattresses contain fiberglass as a cheap method to achieve required fire resistance ratings. The use of fiberglass in mattresses has become a consumer issue, with class action lawsuits and numerous complaints from consumers. The US Consumer Product Safety Commission sets specific rules for the tests and standards to which mattresses must adhere to, including flammability standards. Fiberglass is often used in memory foam mattresses and mattress toppers, and is an economical way for manufacturers to meet the standard of flammability requirements. Fiberglass may also be listed under other commonly used names, like glass-reinforced plastic, glass-fiber reinforced plastic, glass fiber, glass wool, or fiberglass-reinforced plastic. The following brands have confirmed that they use fiberglass in their mattresses or have fiberglass listed on the materials list of the mattress: Ashley Furniture, Casper, Linenspa, Lucid, Molblly, Olee Sleep, Purple, and Sleep Innovations. However, in most cases, the use of fiberglass is only used as a fire retardant within an enclosed cover, and many companies still enclose the material within other layers or make the fibers otherwise inaccessible to sleepers to minimize the risk of exposure.