If you look under the rim of this hat, you will see that the designs on the inside and the outside are identical. This effect is created with full-twist overlay twining using double wefts (photo): two wefts are twined as a pair and given a full twist each time they pass around the warp. The more common way to produce identical interior and exterior designs is to use a single weft, which passes around the warp without twists. Photo: C. Fallon, The Art of the Indian Basket in North America, 1975