It's not a sticker. It's not something revolutionary. It's just something that can come in handy. A stretchy, mesh cargo net with clips that attach to the factory cargo rings.
The Bronco can haul groceries and all sorts of goods, but sometimes they have a mind of their own and can move without a little encouragement to stay in place.
If you don't want things shake, rattling, and rolling into soft plastic trim pieces and a painted rear tailgate, consider picking one up.