It is Polyester and is typically used for inflatable SUP's, boats, rafts, It is made on a drop stitch loom，double wall polyester fabric,

The following are the specifics.
-Thickness 9.5cm
-Width 1540mm

-Warp Denier 1000
-Weft Denier 1000
-Pile Denier 500
-Warp Density 24/inch
-Weft Density 28/inch
-Pile Density 20/inch
-Weight (790g/m2)