Chart cases you can write on

Hello!
I have a question on chart cases. I waned to get the NRS one but I would like a chart case that I can write on without washing off in water, while still being able to get it off with a reasonable amount of scrubbing. Does anyone have any recommendations for charts holders or markers? I read that dry erase markers are too difficult to get off of the NRS cases.
Thanks!

I use a grease pencil. Tides are written on the deck and notes go on the cover of the chart case. Magic eraser cleans it up.

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