As it is a dark colored product, we suggest that some precautions be taken  because it can cause stains on the clothes,
as stated on the packaging. 
We suggest not using it with white or light bikinis and preferably that it is not new, as they tend to absorb more easily
the coloring of any dark colored product. 
But if you stain your bikini you can soak it in Vanish,
because usually the result is great !!!!