Made from Hagerty Silversmiths’ Cloth with R-22, Hagerty Tarnish Preventing Silver Keepers are specially treated to constantly trap tarnish-causing sulfur gases. These zippered storage bags are excellent solutions for keeping fine sterling, silver plate, and gold hollowware tarnish-free between special occasions. This 9″ x 12″ Zippered Bag holds a large gravy boat, tall compote, small tray, etc.