SAND IT

Roughly classify documents, notebooks and more!
"SAND IT" helps you easily organize documents by just throwing them in. It is unique in that its elastic string adjusts the thickness in accordance with the contents.
In addition to documents, SAND IT Document Holder can also store clear file holders and thick booklets. And 2 tabs for classifying contents are inside. Card holder can store business cards or shopping cards.
3 sizes, A4 [vertical / horizontal] and card sized, are available. 5 colors, Yellow, Green, Blue, Gray and Black, are optional for each size.