Westcott Collapsible Full-Stop Diffuser (30") Quickly and easily diffuse harsh light: When harsh sunlight causes shadows on your subject place the diffuser surface directly between the sun and the subject to diffuse this harsh light. The same concept can be done when using studio lighting indoors Units collapse and fit easily inside travel case: The diffuser quickly collapses into a third of its open size. The included travel case protects your diffuser when traveling Riveted high-quality frames: Reflector frames are double riveted to stand up to years of abuse