Our Fortnite Back Bling List has all of the cosmetics you can obtain in the Battle Royale Item Shop, Battle Pass, or through Promotions. Most Back Bling (Backpacks) are gained by purchasing a skin, if that is the case the skin will be listed below the image in the gallery.
You can find all of our other cosmetic galleries right here. See what you can purchase in the shop in our Fortnite Item Shop post!