American Crew Tea Tree Shampoo This American Crew Tea Tree Shampoov works to soothe the scalp and provide a thorough but gentle cleanse of the hair. Containing echinacea nettle extract and black tea extract this shampoo can work as a mild antiseptic and healer soothing any irritation on the scalp and can even be used to treat mild cases of dry scalp or seborrheic dermatitis. Stimulating the circulation of blood to the scalp this shampoo is a nourishing tonic with anti-inflammatory benefits that soothes the scalp and cleanses the hair leaving you feeling refreshed and ready for the day ahead.