Sunbrella fabric is water repellent, mildew and UV resistant. Plus, Sunbrella fabric is woven, which makes it breathable, so it doesn’t trap heat and moisture like vinyl. Nor will it tear or shrink. This is not a generic mass produced cover. This is a custom boat cover, measured and designed specifically for the Highfield Classic 310 with monuted FCT Console( tubular aluminum steering console). Cover will fit over 2 and 4 stroke outboard motors. Our covers feature an elastic shock cord to ensure a taught fit. When installing the cover, make sure the inside tag is at the stern. Cover also comes with 3 tabs on either side in order to secure the cover while trailering or in windy conditions.