The Large Changing Bag from Sensei makes it possible to handle light-sensitive material when it isn't possible to get to a dark room. Two layers of light-blocking fabric provide a roomy area for changing out stuck or damaged film. Spool film onto a loader in 27 x 30-inch darkness while the double-zippered closure blocks any extra light from coming in. The two elastic cuffs further prevent light leaks around your arms allowing you to work in darkness inside the bag.