Silica gel cat sands can absorb all excrement and urine of pets and peculiar smell given off from them. They can also control the growth of bacterium and keep the surface of the sands dry and clean, so the pets may live in a safe and sanitary environment. At the same time, silica gel cat sands can be used as an air-fresh agent, which absorbs some easy-volatile gas and moisture in the air and make the room fresh and clean for us all. Because silica gel cat sands have their unique performance, that is only small amount of waste was produced, the pets' owners will become happy and relaxed.