Gucci is known for its iconic handbags. The company made handbags of cotton canvas rather than leather during World War II as a result of material shortages. The canvas, however, was distinguished by a signature double-G symbol combined with prominent red and green bands. After the war, the Gucci crest, which showed a shield and armored knight surrounded by a ribbon inscribed with the family name, became synonymous with the city of Florence. Gucci's distinctive lines made its products among the most frequently copied in the world in the early 2000s. Pigskin, calf, and imported exotic animal skins were subjected to various methods of fabrication. Waterproof canvas and satin were used for evening bags. Bamboo was first used to make handbag handles by a process of heating and molding in 1947, and purses made with a shoulder strap and snaffle-bit decoration were introduced in 1960. In 1964 Gucci’s lush butterfly pattern was custom-created for silk foulards, followed by equally luxuriant floral patterns. The original Gucci loafer was updated by a distinctive snaffle-bit ornament in 1966.