I used Monks Cloth for my Outer Robes and Onasburg for the Inner Robes. I got both in “Natural” color. For the sash I also used Monks cloth in Natural. Some Walmarts carry these cloths. I got my Monks Cloth at a local Walmart. The Onasburg, I got from Jo Ann’s Fabrics. I used the patterns from TK409.
Word of caution with the Monks Cloth. Wash it before you start making the robes. This fabric shrinks like crazy. Around 15%!!
For dyeing and weathering I used Rit dyes. Colors I used where Brown, Dark Brown, Black. You can find Rit dye at Walmart or at most fabric and craft stores.