Easy to Clean: Whole-body washable, keep wheel clean, increase pets' exercise frequency to keep healthy. Advanced materials: This product has a long service life. The material is made from the highest quality material. It is non-toxic and tasteless, and it does not harm the health of pets. It can eliminate hamster fatigue and increase feelings. Temporary storage: This is a good temporary storage area where you can keep hamsters when they are ready to clean the hamster nest. And the design of the air outlet, even if the hamster runs indoors, it will not suffocate, so that the hamster can exercise well and can also improve physical fitness. Provide Interactive Fun: Provided a healthy and Safe way for small pet or hamster to do exercise, encourages small hamster to take healthy exercise in this ball, provides interactive fun for the pet gerbil and its owner. Good resting place: This toy adopts aerodynamic design, reduces wind resistance, can make hamsters more stable during exercise, provides a good resting place for hamsters, has a good mute effect, and has a long service life.