The present invention relates to a fire resistant, double knit fabric and methods of manufacturing the same. The fire barrier double knit fabric of the present invention includes a face side having a yard including a fire retardant fiber, and a back side having a yard including a charring yarn. The fabric resistant fabric of the present invention can be made in a stretchable tubular sock that can be used on all mattress widths (one size fits all) or as an open form for upholstering, lamination of mattress ticking.