This is a Fukuro obi
with tiny petite flowers on doukyo 'copper mirror' pattern, which is woven.
'Raden'(design in mother-of-pearl inlay) foils are accented on Tare end, Otaiko and Maegara patterns, and they appear fantastically by angle of light.
Gold foil threads included in fabric and the pattern twinkles gently.
Textile is silk, and it has soft touch.
It has folding lines, but not disturbing for wearing.
Please see photos for details.
There are no other prominent flaws, and it is in very good condition overall.