Constructed from Polypropylene plastic for extra resistance to the sun, water, salt, and detergents based or containing acetone. Also it has no hinges, so that you can completely remove the cover. Its opening is easy, as you only need to turn the cover 90deg anticlockwise, and it is ejected automatically thanks to its specially designed thread. Other features: non-skid surface, low profile, and hidden screws for smarter appearance.