Paper lanterns come in various shapes and sizes, as well as various methods of construction. In their simplest form, they are simply a paper bag with a candle placed inside, although more complicated lanterns consist of a collapsible bamboo or metal frame of hoops covered with tough paper. Sometimes, other lanterns can be made out of colored silk (usually red) or vinyl. Silk lanterns are also collapsible with a metal expander and are decorated with Chinese characters and/or designs. The vinyl lanterns are more durable; they can resist rain, sunlight, and wind. Paper lanterns do not last very long, they soon break, and silk lanterns last longer. The gold paper on them will soon fade away to a pale white, and the red silk will become a mix between pink and red.