The Habano Denomination of Origin may be applied to all cigars in which 100 per cent of the tobacco used has been grown in Cuba. Likewise, it is an essential requirement that all cigars manufactured in Cuba are subjected to numerous quality control checks, both during the agricultural and curing process, as well as during all stages of manufacturing in the factory. The same rigorous procedures are applied to the selection of the appropriate leaves, quality control, of draw, of the true flavor of each of the brand names and, finally, the quality of the cigar's appearance and presentation. The quality of the Habano Cuban cigar is the result of the mystical union of four elements: soil, varieties of Cuban black tobacco, climate and the wisdom of our agricultural workers and cigar makers. Numerous attempts to achieve the standards of an authentic Cuban cigar in other areas of the world with seeds of Cuban origin have failed to attain its unequalled quality. These elements: the harmonious combination of the sun, the average temperature, atmospheric humidity, soil and subsoil composition are those which make "the quality of the Cuban cigar, both in terms of agriculture and manufacturing, unique to Cuba". Therefore, the Habanos Cuban cigar trademark printed on the boxes of brand names is the guarantee that these cigars are backed by the Habanos Denomination of Origin Protection. This is a seal of quality and origin that is awarded to only the best cigars manufactured in Cuba under the strictest quality control measures, with the best leaves selected from the island's tobacco regions.