Rubber boots with felt spike sole; Felt spike boots with side zippers for easy on and off. Spike pins are attached to the felt sole for all-round use. Reduces fatigue by utilizing both the felt and spikes. The cup sole has been adopted for a stable and comfortable hold. The heel part comes with an original shape kick that is convenient when removing it. About Whitening (Blooming): The whitening phenomenon of the rubber surface is called blooming, which is a self-aid that prevents the rubber from deterioration as it appears on the surface. This is an inevitable phenomenon to protect the body and prevent deterioration. Please note that this is not a defective product.