Infused with seaweed extract and macadamia oil, this shampoo is gentle and moisturizing for your locks. It rinses clean, even in hard water. Our SLS-free formula is made with cleansers designed for sensitive scalps. Suitable for many hair types, from straight and fine, to thick, wavy, frizzy, as well as color treated hair. Our premium ingredients help your hair feel soft and manageable. These bars are highly concentrated. Most people find the shampoo lasts about half the time of the conditioner. Typically for a long haired person with lightly wavy to straight hair who shampoos every 2-3 days, the 1.5 oz (42.5g) bar will last around 2-4 months (30-60 washes). These are rough estimates based on customer feedback and will vary per person.