Engine Coer Made Of Polyester Fabric, Anti-Mold, Breathable, Water-Resistant And U-Resistant. Suitable For Coering Outboard Motors During Storage. Aailable In Two Densities Of Polyester Fabric: - 300 Denier In Gray CVolvor, Suitable For Use During Winter Storage. - 600 Denier In Blue CVolvor For Maximum Waterproofing And Resistance During Mooring And Winter Storage.