1) Photography equipment 
A changing bag is a photographic bag specifically designed to be light-proof while in use. It is required for certain applications involving photosensitive materials when a darkroom is not available, like in the field. Common usages include removing film from its canister to put it into a developing tank, or loading and unloading sheet film holder...
A light proof black fabric bag that permits film and other light-sensitive materials to be handled in normal room light. Has a double zipper on one end and two armholes with elastic sleeves on the other
A light proof black fabric bag that permits film and other light-sensitive materials to be handled in normal room light. Has a double zipper on one end and two armholes with elastic sleeves on the other. 
A light tight fabric bag, used for safely removing sensitive photographic materials from film holders or backs in daylight.
A double chambered black bag with a zipper on one end and two elasticized arm holes on the other side, used for loading film into magazines
a lightproof bag with openings made to fit closely around the arms, used in place of a darkroom in some photographic procedures.