BOJICABlack Hair Dye 3 in 1 Shampoo for Gray Hair, Herbal Ingredients for Women&Men, Dye in Minutes/Semi-Permanent/(17.6 FL OZ)

Q: How long does the color last ?

Dear ,our hair dye shampoo can last 3-4 weeks.

Q: Can this product be used to color my husband's beard?

Absolutely. It works on the hair on top of your head as well the beird. And there's such a generous amount in the bottle, it's literally shampoo sized. Your husband can touch up his beard as needed. Also remember that the hair should be dry when applied. It lathers very richly, very quickly. Once the recommended time has passed to rinse off, simply hop in the shower to rinse off. This has the benefits of being a shampoo as well so rinsing off is all that's needed. This product is incredibly easy to work with. My new go to for hair coloring.