River boats were made of simple materials because they only traveled along the rivers of Mesopotamia.
River boats were used to transport goods downstream, meaning down the Tigris and Euphrates Rivers.
River boats were usually made of bundles of reeds, lashed together with rope, and sometimes covered with a layer of bitumen.
Bitumen is a tar-like substance used to make boats water-tight.
The Mesopotamians used river boats to carry:
grain
logs of wood; the most precious woods were from pine and cedar trees that were imported from Lebanon.
bricks made from mud; mud bricks were the materials used in building.
wool that was used to make clothes, carpets, and tents; it came from sheep.
beer which was the everyday drink of ancient Mesopotamians
wine
reeds that were cut along riverbanks and used to make boats and houses; the image is of a modern reed house in Iraq, which was once part of Mesopotamia
River boats, like those made in ancient times, are still being used along the Tigris and Euphrates Rivers today.