polyester woven scrim combined with a carded secondary nonwoven layer wherein the secondary nonwoven includes 16 24 pla and is about 8 12 of the full fabric weight with the one or more secondary layers having combined basis weight in the range of about 1 5 to 4 osy the remaining fiber content of the one or more secondary layers may be selected from those fiber components identified above in connection with the reinforcing layer suitable fiber may further include mono component and or multi component filament or fibers such as side by side sheath core islands in the sea segmented pie as well as copolymers and a combination thereof in accordance with the principles of the present invention the fire retardant reinforcing layer is positioned in a face to face relationship with at least one additional layer or secondary layer and mechanically bonded by way of hydroentanglement the hydroentanglement process is well known in the art and taught in u s pat no 3 485 706 issued on dec 23 1969 to inventor evans previously incorporated herein by reference additional layers may include various nonwovens including air laid wet laid spunlace spunbond as well as fire retardant films scrims wovens and combinations thereof woven substrates may include similar or dissimilar warp and weft fibers and numerous weave patterns that lend to the optimization of the fire retardant performance suitable layers typically.