Why are the fabrics with different density and thickness?

The density, thickness and texture of the fabric and the strength level are related. Since the modulus and strength of different fibers are different, it is necessary to adopt different diameters and different denier fibers and yarns in order to achieve the specified strength. Therefore, the difference in the density and thickness of the fabric appears. The polyester is denser than nylon and thicker than nylon; the strong and high fabric is denser and thicker than the strong one.