This is a Tsumugi Fukuro obi
with fash ichimatsu(checkerboard) pattern, which is woven.
Thin ocher colored lining is added inside.
Textile is exquisite silk and has rather nubby and crisp touch.
Both sides are slightly transparent.
The actual background color is darker ocher color than the photos.
It is sewn by Yamato, one of the famous Japanese kimono shop.
It has no folding lines and seems to be untied.
It has no prominent flaws, and it is in excellent condition.
Please enjoy this piece for three seasons casually.