According to the common muffin shoes products on the market, the shoe box will usually be labeled with the material of the sole, and if the sole of the shoes is made of rubber, the shoe box will be clearly labeled as rubber. This is to allow consumers to clearly understand the material composition of the shoes in order to make a purchase decision. Therefore, if the shoe box of the shoes with muffin soles is labeled as rubber, then the sole material should be rubber.