Indigo dye transfer, a common characteristic of raw denim, can lead to unwanted staining on footwear. This occurs because the dye is not fully bonded to the denim fibers and can rub off with friction and moisture. A visible example is the blue discoloration that appears on light-colored shoes after contact with the hem of raw denim jeans.
Protecting footwear from this dye transfer maintains the aesthetic appeal and longevity of the shoes. Furthermore, minimizing dye bleeding helps preserve the integrity of the denim itself, preventing excessive fading in unwanted areas. Historically, methods to mitigate dye transfer have been sought since the popularization of raw denim as a durable and stylish garment.