A hammock is a light and easy-to-carry bedding for outdoor activities. The material used to make the hammock is usually tied to a tree. According to the materials manufactured, it is divided into cloth hammocks and rope net hammocks. The cloth hammock is usually made of thin canvas or nylon cloth, and the rope net hammock is usually made of cotton rope or nylon rope. The rope net hammock is particularly suitable for tropical jungles and hot summers, while the cloth hammock has a wider range of applications. It can be used in other seasons except in severe cold areas and winter.