Designed to be fitted whilst the boat sits on its trailer and still cover the entire underside of the hull for travelling. Elastic draw cord around the top and 4 straps across the deck to tension. Built in 9oz Nylon with a light polyerethene backing which impregnates the weave on the inside of the cover to prevent dirt and dust ingress. This makes the cover only 95% waterproof to allow a wet boat to breathe. Water trapped on the deck can drain via a mesh which covers the transom area.