I cover the opening of my cab with thick plastics black sheet, it is 4 milimeters thick, thick enough to keep light out. I just cut a piece to size a little wider tho. I then stapled and duct taped the top, then set up velcro around the edges so the extra black plastic has enough room to wrap around the edge and keep light out:thumbsup:

U can get the black plastic at lowes for like 10$, well worth it, they use the stuff to lay down when painting rooms and stuff so the paint people can help u out, then get some self applicable vecro (industrial strngth) and some duct tape.... Walllaa