This Kaiser semi-custom boat cover is made from 8.1oz/600d/ 600 denier marine grade polyester.600d is an indirect measurement of density and weight. The higher the number, the heavier, thicker, and heavier duty. This is the thickest cover you will find. You will see a lot of 300d, even 150d covers, which are proportionally half as thick and 1/4 as thick as our covers.The fabric we use is coated twice with polyurethane on the bottom or downside, UV protected, and mildew protected.The material of this cover is heavy duty enough to support towing speed up to 60km/h. This particular unit is "Styled to fit" Bowrider / Half Cabin / Cuddy Cabin boat with bow rails up to 400mm height and windscreen / cabin up to 900mm height from gunwale that is between 16.7 and 17.6 ft long, with a maximum beam of 92".How to measure your boat for a boat coverMeasure the length using a straight measurement from bow to stern (including bow rail).Measure the beam width across the widest point of the boat. Material has some stretch to conform to boat shape.The actual length of this cover is 6.21m and its actual width is 3.53m.
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