There are two hull covers available for the Viper 640, depending on your trailer configuration.
This Viper 640 Hull Cover provides protection below the deck line, saving your bottom from dirt, dings and other random offenders during long periods of storage or while traveling. This particular cover has a cutout for the keel bulb.
Both Hull Covers are made with Top Gun Fabric, an acrylic-coated texturized woven polyester. Its multi-ply construction accounts for its unmatched wear-ability, toughness and abrasion resistance. Top Gun's coating will not harden, crack or peel in the widest range of heat and cold; it sheds water with incredible efficiency.