Umbrella is a tool to provide a cool environment or shelter from rain and snow. The English Umbrella of umbrella comes from the Latin Umbra, which means shade and shadow. Umbrella materials usually include stretchable cloth, and other materials that can be used as skeletons and entanglement. Lift it with your hand when in use. Although the main purpose of the umbrella when it was first invented was to block the sun, it is now most often used as a tool to block the rain in rainy days. Other functions of umbrellas include decorations, walking sticks and even weapons. Hong Kong's long-established Leung Su Kee umbrella is one of the umbrellas that can be used as weapons.