This is a Fukuro obi
with colorful Shiba(grass) pattern, which is dyed.
Textile is silk, and it has soft touch.
Plants are trees are woven on fabric, and they appear by angle of light.
Both ends are closed, but there is no lining inside.
There are small stains on Otaiko pattern, and they may be disturbing.
It has some other flaws, such as a tiny snag and prominent folding lines on the wrong side, as shown on photos.
Please see photos for details.
If you do not mind the small flaws mentioned, it can continue to be worn.