I use any pen with pigma ink. It is permanent. I use the gelly roll pens, from the scrapbook aisle, a lot and haven't had any issues. I do not use the glitter ones or the ones that go on in one color and you "erase" it and a second color appears. I also use any fabric marker. I do not use the Sharpie markers as they bleed too easily. Again, I heat set everything first before washing.

I can get the Pigma pens cheaper at my local art sotre than my LQS.

ali

I've found them at Michaels & my LQS has them. JoAnns may have them, I just have never looked. My Walmart did not even have any for scrapbooking, much less for writing on fabric.