The new kingkong k30 is a 100% polyester cover (18.1 x16.9 x 30.9-inch). Fine workmanship, good stitching, dust-proof, moisture-proof, breathable, laceration resistant, high strength and elastic recovery ability, corrosion resistance, durable, easy to clean, good abrasion resistance, good light resistance, resistance to various chemicals. Quality assurance for a year.