It seems no one wore shirts in 871 BC. The closest thing to a modern shirt was the כֻּתֹּנֶת keh-TOH-net. Most hung from neck to ankles and buttoned at the throat.
These drawings in an Egyptian tomb show people from the East — perhaps the Middle East — entering Egypt about 1900 BC. Notice how the outer garment serves as a wrap that leaves one shoulder and both arms free. The nearest Biblical contemporaries of these people were the earliest of Hebrews, such as Abraham.
The next photo shows a rare depiction of Hebrew clothing. King Jehu, or possibly Jehu’s ambassador, kneels at the feet of Shalmaneser III on the Black Obelisk.