Even if you become skilled to the smartphone, there are times when you want to handwriting.
If you put as one of your emergency supplies, useful in case of emergency.
We think often "if there is a piece of paper at such a time like this" in the shelter of the affected areas.
It is safe when wet in water, because made of silicon.
To a person who purchases from the NetShop Palmyra, comes free with a oil-based pen and an eraser.