Sewline Water Erasable Ink Pen 0.8mm

It is a pen that can erase the writing mark with water.
The pen tip is a ballpoint pen type, and you can roll it on the cloth to write smoothly, so you can write finely without damaging the cloth.
If you want to partially erase it, you can easily erase it by using "Sawline Pen".
In the conventional batting type chaco pen, the cotton inside the pen is soaked with ink, so some ink cannot be used up, and when the amount of ink is low, it becomes thin and faded.
However, this pen that disappears with water is economical because it contains the ink as a liquid, so you can use all the ink and write cleanly to the end without waste.