Offworld Rig backpack is a Legendary Fortnite BackBling. Is Part of the The Seven set.
This backbling was added at Fortnite Battle Royale on 3 April 2019 (Chapter 1 Season 4 Patch 8.20-CU).
The Set The Seven contains 7 cosmetic items.
The back bling Offworld Rig belongs to Chapter 1 Season 4. It's not yet known how to get the cosmetic Offworld Rig.