Solid shampoo is an eco-friendly and practical alternative to traditional liquid shampoo. This type of shampoo comes in a bar form, similar to soap, and offers multiple benefits for both the user and the environment. Its compact size also makes it ideal for traveling, as it takes up less space and doesn't pose any issues with luggage restrictions. Solid shampoos are typically formulated with natural ingredients and are free of sulfates, parabens, and other harsh chemicals, making them suitable for all hair types, including the most sensitive. When using solid shampoo, it's important to store it in a dry place between uses to extend its life.