this cotton flame retardant canvas is higher weight fabric, thicker yarn, weft and warp is multi yarn, better wear resistance. Matched up with Yulong maturity FR craft, this flame retardant canvas fabric is self-distinguished when leaving fire, non-molten drop, char length is within 10cm, soft touching, super good strength/ wear resistance, weaving is very tight. Arc proof property about this flame retardant canvas is also good.