Stadium seats can be hard on ye ole buns and not all stadiums are domed for protection against bad weather.   But you can still enjoy the game while sitting in rain, sleet, hail or snow in the Bag Man, your own personal padded biosphere for fallen fashionistas.   This boxy invention combines a padded seat cushion with a weatherproof zippered cubist contraption that allows you to poke you face out to catch all the action.  It even incorporates a lap flap that not only protects your lap from the elements, it also doubles as a serving tray.   Now all you need to do is to stick your feet in a paper grocery bag to complete your exquisite ensemble.