Jerry Cantrell took the title Rainier Fog from the Mount Rainier, a volcano that overlooks the Seattle metropolitan area. The cover art was revealed on June 27, 2018, and it features a black and white image of a triangle floating on the sea surrounded by fog. The triangle has an eye in the middle, similar to the Eye of Providence (or the all-seeing eye of God). The digipak packaging has a die-cut eye. A person of unknown gender with short blond hair can be seen from behind inside of the eye. When the booklet is opened, it is revealed that the person inside of the eye is actually standing on a river and looking at the Mount Rainier, and the drawing of an eye has tears falling down straight into the river. The artwork was designed by Ryan Clark, who also designed the artwork for Alice in Chains' previous album, The Devil Put Dinosaurs Here (2013). Photos of the band taken by Scott Dachroeden complete the booklet.