This is a Fukuro obi
with dramatic flowers pattern, which is woven with foil threads.
Sparkling foil threads used in the pattern makes this obi suitable for a formal usage.
Textile is silk, and it has soft touch.
Flaw A is from adhesive tape, and it will not show when tied.
It has some other flaws, such as a slight folding line, as shown on photos.
Please see photos for details.
Overall, it is in very good condition and can continue to be worn even on a celebratory occasion.