It's "soap" with a pH that is less than 7. It doesn't matter much for short hair, but washing long hair with actual soap makes the usefulness of shampoo obvious

It's "soap" with a pH that is less than 7. It doesn't matter much for short hair, but washing long hair with actual soap makes the usefulness of shampoo obvious. Actual soap, with a basic pH, makes hair very difficult to comb.