- This highly concentrated shampoo gently cleanses hair and scalp while providing incredible volume and fullness. Great for fine or limp hair that craves moisture and body. pH 5.0-6.0. Enjoy presents Volume: offering and array of robust, stimulating solutions for much stronger, fuller, thicker and healthier-looking hair. Wet hair. Apply shampoo, work into hair and scalp and then rinse. For more intense lather, repeat the process. Follow with the ENJOY® conditioner of choice.