The surface material of our plush dog toy is made with skin-friendly crystal flannel and bubble cotton, ultra-soft plush fabric for snuggly softness, you don't need to worry about the dog's gums being scratched during chewing, also natural cotton knotted rope make the toy more bite-resistant that is a perfect cuddle buddy. And it also has a waterproof layer inside to prevent the dog's saliva from entering the filling cotton, which can be washed with water.