The Power tank brand is well know for it's performance in any weather conditions, so it made sense that we chose it as our preferred brand.
A brilliant Pen, will work in any type of weather conditions, it even works under water.
Highly recommended. A pressurized ink delivery system enables the Power Tank pens to continue writing upside down, in extreme cold (up to minus 20 degrees), on shiny surfaces, wet paper and even underwater.
A perfect match for your Re-writable cards.