The manufacturer says: "Sunshine ® Cloth - Cleans, brightens, and removes tarnish and fingerprints with special non-scratch micro-abrasives. The best product we have found on the market! Sunshine® Cloth is a non-toxic polish impregnated felt cloth that can be used repeatably. It has been a favorite in the jewelry industry over other types of polishing cloths and chemicals. Cloth measures 7 1/2" x 5"."
We thought this sounded good - but didn't believe it until we tried a sample. It does a nice job on tarnished Sterling Silver and brightens solid Copper items, too. Store it in the zip-lock bag that it is packaged in - and don't wash it (that will remove the micro-abrasive material within the cloth). Can be used repeatedly - and will also work on metal items besides jewelry (silver flatwear, coins, etc). Please don't use this on thinly plated items - it will eventually rub the plating right off to expose the base metal beneath.