Shampoo-In Hair Dye in Light Brown shade from Just for Men, Men’ Hair Dye. Nourish and strengthen hair with Vitamin-E. It has 3 packs. Hides grey and blends perfectly with natural hair color and hides your grey hair. You will get 3 applications per box and the color will last upto 8 weeks unless your grey starts coming up again. You can select from 15 more shades available. Check out this pack and save $6.81.