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I'll let ColcaSac discuss the Uintah materials as they do it more dramatically.
The Uintah is made with a natural dark taupe, heavy duty 20 oz hemp canvas. You are seeing the natural color of the hemp fiber--no processing or dying with this fabric. The hemp is grown and harvested in rural China, where it grows quickly and plentifully. Hemp is grown naturally without pesticides, is easy on the soil, and is nature's strongest natural fiber (if you don't count the spider web).
Best of luck to all!
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