Which technique is useful for adding volume to fine hair?

Blow drying upside down is an effective technique for adding volume to fine hair because it allows the roots to lift away from the scalp. When hair is dried in this position, the natural lift at the roots is enhanced, creating fullness and body. This technique takes advantage of gravity and airflow, leading to a more voluminous appearance as the hair strands dry in an elevated position.

In contrast, flat ironing tends to smooth hair and make it appear sleeker, which can lead to a loss of volume rather than an increase. Using heavy products can weigh fine hair down, making it look flat and lifeless instead of voluminous. Over-brushing can also cause fine hair to lose its shape and may lead to further flattening, as well as damage. Therefore, blow drying upside down stands out as the most effective method for achieving added volume.