It is a Japanese traditional fabric bag, which has strings on the top.
Only pull these strings to close the bag. Really easy to open or close, although the contents are difficult to come out by themselves.
Kinchaku is basically a bag when you wear Kimono or Yukata (maybe you have seen in Japanese Manga or Anime), but now it is also used for everything- for Bento Box, cosmetics, or valuables like passport and wallet.
If you thought Furoshiki is too difficult for you, you can get Kinchaku instead - even children can use by theirselves!
You can get Kinchaku everywhere, not only Omiyage shops or Kimono shops.
There are tons of colors, patterns, sizes and shapes!
About the material, "Chirimen"is most traditional, but there are more types also.
Find your favorite!
For kids when wear Kimono
Totoro Kinchaku! so Cute!!
It is also easy to make by yourself. If you like sewing, make it for your kids, then they might be able to be stars in the class!!