Who Invented It: C.C. Filson
Year Introduced: 1897

Clinton C. Filson founded the Pioneer Alaska Clothing and Blanket Manufacturers in Seattle to outfit pioneers and prospectors looking to make their fortune in the Klondike Gold Rush. The Mackinaw wool was famed for its warmth and durability—it absorbs a crapload of water without becoming damp at all, and since Filson owned his own mill and manufacturer, he was able to keep costs reasonable.