Pebeo Setaskrib+ Pens are felt tip markers made for drawing and writing on fabric. Permanent and washfast after heatsetting with an iron for three minutes. Colors can be mixed by using one on top of another while wet to produce blended shades. They blend better than any other marker we tried when coloring large areas, making it look more like a painting, and less like a drawing. Transparent effects are also possible by using new colors over dry colors. Use as an outliner for silk or with stencils as well.