How is the Grav-Fusion Fortnite Wrap reactive? Each time shooting a weapon a light purple set of lightning starts glowing on the Wrap

Level 9 in the Chapter 2 Season 5: The Zero Point is required to get this

How to Get the Fortnite Grav-Fusion Wrap? The Fortnite Grav-Fusion Wrap was available in the Chapter 2 Season 5: The Zero Point. In order to unlock it you needed to reach Level 9 in the Chapter 2 Season 5: The Zero Point. Sadly It is unlikely that you will be able to get this item anywhere else if you missed the Battle Pass from this specific season.