The 33.5" Transparent Umbrella for AD300Pro Flash Head from Godox is a modifier that spreads light over a broad area of your subject. Unlike standard black-backed umbrellas, this umbrella is translucent allowing light to escape from the back of it (convex side) and raise the ambient light level. A unique feature of the umbrella (thats great for low ceilings), is the option of turning it around to "shoot Through" it by pointing the curved outside of the umbrella at your subject for a slightly crisper quality of light.