Denier testing measures the thickness and weight of individual fibers in PU (Polyurethane) fabric, providing insights into its durability, strength, and overall quality.Denier values can vary significantly based on the type of fiber, weave, and intended use of the fabric.Industries such as fashion, outdoor gear, upholstery, and automotive use Denier testing to ensure fabrics meet specific strength and durability requirements.Higher Denier values generally indicate thicker and stronger fibers, leading to increased fabric strength and durability.