Pendleton Woolen Mills has created distinctive blankets honoring America's National Parks since the early 1900s. Each blanket has unique historic designs and colors that date back to frontier trading posts. The original blankets had 3, 4, or 5 black stripes incorporated in the design, which indicated the value. Fur trappers would bring their catch to the trading posts, and traders would hold up fingers to indicate the weight of the blanket in pounds that they were willing to trade for the trapper's goods. Choose Glacier National Park in Montana (natural with black, yellow, red, and green stripes), Yellowstone National Park spanning Wyoming, Montana, and Idaho (yellow with red and navy stripes), or Grand Canyon National Park in Arizona (navy with yellow, orange, and red stripes). Each blanket has the Pendleton label with the park name and an image of an important natural feature in the park.