I just found the FriXion by Pilot. I purchased mine at Office Max. They come in the erasable gel pen with a 0.7mm or a 0.5mm point. They also come in an erasable ball point (our Office Max didn't have ball point style). The gel pen came in red, blue and black. I haven't had it long enough to do an informative review, but my friend uses hers on quilts that her church hand quilts. She said they have had no trouble with the pen leaving marks on the quilt tops. Checking your own fabric is good advice.