This is a Tsumugi
zentsu 'fully patterned' Fukuro obi
with vibrant gradation pattern, which is dyed.
Pieces of foils are accented in places.
Textile is Tsumugi
silk, and it has soft to the touch.
It has folding lines, and edges are slightly smudged.
Corners are slightly frayed and the wrong side has an uneven spot of weaving.
Main side fabric is sagged and there are wrinkles in the middle part because of it. (sorry no photos)
Please see photos for details.
With a small touch, it can continue to be tied.