Not shaped to fit a boat shape; it's just roughly a rectangle. If your boat has any sort of windshield I'd recommend getting the next size up then your length/width suggests. Fabric is lightweight, medium duty at best. Bought this one as it said it was twice as thick as some competitors, so was disappointed to open the box and see how thin it was. Gets pretty windy where I live so let's see what happens when the breeze picks up. With no extra reinforcement where the tie downs join the fabric I expect it will rip easily when put under a decent wind load.