More about the guidelines
Here's why bleached, permanently colored or gray hair is restricted:
It takes at least 8 to 15 ponytails to make a Pantene Beautiful Lengths wig, and each one comes from a different person with a different shade of hair. For a realistic-looking wig that has consistent color, all these ponytails must be processed and then dyed the same shade. It is critical for each ponytail to absorb dyes at the same rate in order to create a wig that is one natural-looking color. Gray hair and some chemically treated or permanently colored hair does not absorb dye at the same rate as other types of hair. It is much harder to color and, once colored, fades more quickly.