Luffa sponge, alias Luffa shell, is a reticulate body obtained by natural air drying of plant Luffa sponge, which is elastic. According to Li Shizhen's Compendium of Materia Medica, loofah sponge has the functions of expelling wind and dredging collaterals, promoting blood circulation and resolving phlegm, removing heat and benefiting intestines, cooling blood and detoxifying. Has an important health care function.