These ultra washable Crayola markers make it so easy to mark a quilt so you can actually see the lines. You will need to machine wash afterwards so it isn't for ALL quilt projects, but I find the thick bold line and the choice of colours really helpful, especially when I'm using unconventional fabrics. Make sure you use ultra washable though and quilt and wash it soon after marking, don't leave it for weeks. If you're nervous, do a test on a sample piece of fabric first and throw it in with a lo