Brighten your hair with Gruum Har Zero Plastic Shampoo Bar - Brightening 50g:

b" Designed to enhance shine and radiance in dull hair while maintaining softness. 
b" Infused with natural ingredients to nourish and revitalize hair color. 
b" Perfect for adding vibrancy and life to your locks.

Wet the bar and rub it between your hands or directly on your hair to create lather, then rinse thoroughly.