I have had the pleasure of buying several packages of Frixion pens this past year. They are now being offered in a multitude of colors, brights and darks alike. Yes, they Do erase by pressing the marks with an iron. It works like Magic! I got mine on Amazon. They are now my favorite go to for marking quilts before stitching. The only thing is they don’t come in White,, which is always needed when marking black or navy, or dark fabrics.