I really like the white Clover powder markers (with tiny wheel) but have had the blue & the yellow get imbedded in the quilt & took forever to get the marks out & some of them never did come out. I use the frixion pens & really like them & with just a shot from my iron, the marks disappear. Just don't put them in your freezer because the marks
re appear. I don't put my quilts in the freezer so that's not an issue for me. LOL The best advice is to make sure you try your markers on a scrap of your material to make sure they will come out.