Bounce diffusers make a soft, indirect lighting possible even when a suitable reflection area such as a white wall or ceiling is not available to bounce the flash light off. It can be fixed by use of velcro tape.
These Metz Bounce Diffuser bounces and scatters the light output of the Metz mecablitz 58, 54, 48, and 44 flash units, for a more pleasing and even exposure. Light loss is approximately two.