The 40° Softbox Grids are made of nylon-webbed fabric to be lightweight, portable, and durable. Grids now fit our OctoDomes, HalfDomes as well as all Softboxes except WhiteDome 40° Nylon Grids - Velcro onto face of softbox giving you precise control of lightspread with no lightspill onto backdrop, floor, or ceiling Individually sewn edges - which ensures precise light placement.