So my office started supplying the Pilot Frixion erasable pens and the needle point and smooth ink make it a good pen for me. Well I was a little shocked when the sunlight coming in the window beside my deck suddenly started erasing the writing on the page before my eyes. Be warned folks that this ink reacts to both heat and cold so these pens are fine for jotting down stuff but not if you want to long term be able to access the notes.