From Manufacturer
The Manfrotto TriGrip 48" Difflector is made of a unique material which allows light to pass through one side for use as a diffuser or bounce off the other soft silver surface. So is it a diffuser or a reflector? Well, it's both; it's a "Difflector." The balanced rounded triangle shape coupled with the ergonomic TriGrip molded handle make it an ideal tool for the solo photographer.
Hold the reflector with just one hand
Use as a diffuser or a bounce reflector
Assistants can hold two Difflectors; one in each hand
Collapses to a third of its original size