Abstract: A weatherproof container configured to be secured within an open style utility trailer wherein the weatherproof container is operable to protect objects disposed therein from the elements. The weatherproof container includes a body said body having a plurality of walls, a bottom and a top forming an interior volume. The plurality of walls having circumferentially disposed thereon expansion sections that are operable to provide height adjustment of the body. The expansion sections include an upper perimeter edge and lower perimeter edge with an expansion member integral therebetween. The body further includes at least one access seam operable to provide entry into the interior volume of the body. The body further includes a plurality of reinforcement straps on the top thereof. A plurality of access apertures are further provided being journaled through said plurality of walls. Tie down members are present to secure the body to a trailer.