Isaiah 20:2
At the same time spake the LORD by Isaiah the son of Amoz, saying, Go and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot. At the same time spake the LORD by Isaiah the son of Amoz, saying, Go and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot.
The Lord told Isaiah to loose the sackcloth from off his loins and to put off the shoe from his foot, and he obeyed by doing so. By going among the people in this unusual barefoot manner he served as a prophetic sign. Naked here means having laid aside the cumbersome outer garment or outer robe, not being unclothed, with the same usage appearing of Peter in John 21:7 and of Saul in 1 Samuel 19:24.
In other terms the action is portrayed as going barefoot and unclothed. The verse belongs to the prophecies and historical accounts from Isaiah's active public ministry, rather than the later section of the book focused on future deliverance. It is part of a prophecy concerning Assyria.