Eastex Products, Inc. is introducing a new line of knitted fiberglass sock fabric (Allesandra) for use with foam mattresses. The Tek Barrier FR Sock is constructed using a patented dual-core yarn from Allesandra. It consists of a fiberglass core wrapped with nylon and polyester for superior abrasion resistance, then wrapped again with Basofil and Modacrylic for FR performance. The Basofil is inherently nonflammable. The Modacrylic is a flame-retarding fiber that works to snuff out the fire.