Kiloware is a term used for packages of postage stamps that are sold to stamp collectors by weight, usually in kilograms, instead of being sold by quantity. Kiloware typically contains used stamps on paper from mail clippings, but loose stamps are also sold as kiloware.
Mission kiloware, also called mission mixtures, are kiloware formed by volunteers to sell to dealers for the purpose of raising funds, often for charitable organizations and churches. Typically, mission kiloware contain a large amount of duplicate definitive stamps, which are the regular issue stamps of a country.
Some mission kiloware are labeled as "unpicked," meaning the more rare and valuable stamps have not been removed from the mixture so that there is a better chance of finding a rare and valuable stamp.