When the Expedition reach the Columbia they for the first and only time saw a new style of hat that they became facinated with. These hats were worn by most of the Chinooks and were used to repell rain water from their heads and bodies. There is strong evidence that these hats were originally brought from the Pacific or Orient, possibly from Hawaiian traders. Clark drew a simple drawing of the hat and the Captains had custom sized hats made for themselves. Before departing Fort Clatsop, the Captains bought a hat for each of the 31 troops as gifts. It is possible that the captains and troops traded their hats for other goods on their way back to St Louis.