The Empire Plus cover is our most waterproof cover. The fabric is constructed of three layers. Two layers of polypropylene and one layer of a micro-porous film sandwiched between them. The micro-porous layer provides superior water protection and is also breathable. This cover also protects your vehicle from UV rays, acid rain, tree sap, dust, dirt and other pollutants. The Empire Plus car cover includes scratch proof tie down grommets, a storage pouch, a 5 year warranty, ultra-sonic seams, and a fully elasticized hem for a tight semi-custom fit. If you need additional information, email us at sales@empirecovers.com