600D linen type cationic fabric PVC is a type of fabric made from linen fibers that have been twisted together to create a durable and strong material. The "D" refers to the denier, which is a unit of measurement for the fineness of fibers. A higher denier means thicker, stronger fibers. "Cationic" refers to the type of dye that is used on the fabric, which is a positively charged dye that is attracted to negatively charged fibers. The fabric is coated or laminated with PVC (polyvinyl chloride) which is a synthetic polymer. PVC is a common and affordable material used in many applications such as flooring, upholstery, and clothing. PVC coating or lamination on fabric makes it more waterproof and gives it a different texture and feel. 600D is thicker than 300D and thus more durable and strong.