Half a stop of soft directional diffusion in a fabric that gives nothing back to the room, the 1/2 Stop Silk Black is what goes up when a source needs calming but the set can't afford extra bounce. The black weave holds the contrast the DP built while the silk gently spreads what comes through. Sizes run 4x4 through 20x20, all sewn in the USA by LA Rag House. Set it, check the meter, move on.