Hallock's Brown Trout - $37.99 Udesen's Keep 'Em Wet - $37.99 $37.99 X MFC's Midge Flyweight Fly Boxes are ultra-light, floating fly boxes that utilize MFC slit foam for long lasting organization of your bugs. These boxes are super-slim and will slide right into the front pocket of your favorite fishing shirt. Tagged: Foam fly boxes Vendor: MFC Type: Fly Boxes SKU: