A rack cover assembly including a first side cover and a second side cover. The first side cover may include a first tensioner and a first flexible rectangular sheet. The first tensioner may be coupled to the first flexible rectangular sheet at or near a first lateral edge. The first tensioner may include a first tensioner height that is less than a first sheet height between the first top edge and the first bottom edge. The second cover may include a second tensioner and a second flexible rectangular sheet configured to couple with the first flexible rectangular sheet. The second tensioner may be coupled to the second flexible rectangular sheet at or near a second lateral edge. The second tensioner may include a second tensioner height that is less than a second sheet height between the second top edge and the second bottom edge.