http://officesupplygeek.com/pen-revi...e-gel-ink-pen/
I had not heard of these pens - been looking for a better fabric market. The link is a review of the pens, and answers one question I had. They say that if the marks are exposed to "cold" the marks will reappear. Fading out while sitting in a hot car could be a problem in Texas! But, will they return in the winter? I don't have hot water to do laundry with in the winter - sometimes it's 36 degrees! Maybe I better keep looking for a better marker for quilting!