What is the trick to adding volume without too much bulk?
The best time to add volume to the hair is right after it is washed. When hair is greasy it doesnt keep volume well because the roots are heavy. After washing the hair, I recommend applying Shu Uemura Art of Hair's Fiber Lift, working it through the roots. Then blow dry the hair as usual. Once the hair is dry you can always slightly back comb it to create even more volume and then finish off with Shu Uemura Art of Hair's Sheer Lacquer. Lastly, weather often affects hair volume. For example, humidity minimizes hair volume because when your base is sweaty, its hard to keep the volume on top and the only way is with hair spray.