The best shampoo for a human hair wig is gentle, moisturizing, and not overloaded with harsh detergents. Sulfate-free formulas are usually a safer starting point.
What to look for
Choose shampoos made for dry, color-treated, or chemically processed hair. Human hair wigs do not receive scalp oil, so they dry out faster than growing hair.
What to avoid
Avoid clarifying shampoos too often, heavy buildup, and rough scrubbing at the cap. If the wig is colored, avoid formulas that strip color.
Bottom line
Use a gentle sulfate-free shampoo and follow with conditioner. The best shampoo is the one that cleans without making the wig feel brittle.