With this Batman Backpack can be determined also fly, although I'd rather not try it. Batman Hooded Costume Backpack with Wings, by DC Comics:

Batman backpack with wings

Transform into the Dark Night instantly with this slick Batman suit up backpack! The black backpack features Batman’s signature bat logo on the front just Above a small zip pocket, but it doesn’t end there! Hidden in three zip compartments are a hood complete with bat ears and bat wings on either side complete with wrist straps! To complete the transformation simply fasten the chest strap which has a Batman shield logo and the waist strap which has a utility belt for all Batman’s essentials! This is a teen/adult backpack recommended for ages 14 and up. Shoulder straps, chest and waist straps are all adjustable to fit your frame.

Batman backpack with wings
(via BIOTV)