Abstract: The invention is a flame-retardant fabric which includes a network of interconnected yarns. At least some of the yarns comprise fiberglass fibers. At least 30 weight percent, and preferably substantially all of the fiberglass fibers in the fabric are coated with a polymer composition comprising a fiberglass binding agent. The fabric of the present invention is used as a covering in furniture, such as a flame-retardant sock to surround the core of a mattress. The invention is also a method of producing a flame-retardant fabric. A fabric of interconnected yarns is provided. At least some of the yarns comprise fiberglass fiber. Those fiberglass fibers are coated with a coating composition comprising a polymer and a fiberglass bonding agent.