All Profoto Softboxes have a recessed front that allows you to attach a softgrid. The Profoto Softgrid 3-Feet Octa reduces the light spread to 50 degrees. In other words, it creates a more directed light and eliminates a large amount of spill light, allowing you to shape the light with even more precision. By limiting the spread of light, a softgrid can help to create more contrast in your images, resulting in a more dramatic and moodier look. In regard to reducing unwanted spill light, it is especially useful when you need to avoid illuminating the background or surrounding areas. It comes with Hook-and-loop Fastener that help in a fast and easy setup. The Softgrid 3-feet Octa is made with high-quality fabrics and comes in a labeled soft pouch. It is compatible with the Profoto Softbox line, but cannot be used with the RFi, OCF, and Clic Softbox ranges.