I agree I absolutely love these and my mom uses them to mark her patterns for hand embroidery. I didn't realize that Staples also carried them thanks for that info. the only thing I have heard is that the markings can come back in the cold - I think it was 20 degrees or if you put it in the freezer. If my quilt is ever out in 20 degree weather I can bet the last thing anyone would be thinking of is seeing the marking