Yosoo 12-PACK,3-COLOR Disappearing Vanishing Erasable Ink Temporary Marking Fabric Marker Pen, Use for Cross Stitch Fabric or Quilting Project Package Included: 12 X Erasable Maker Pen(4pcs per color) Color: Pink, Purple, Blue Pink pen : Automatically disappear or wipe off with water in 1-7 days,Purple pen : Automatically disappear or wipe off with water in 2-14 days,Blue pen : Writing trace does not disappear automatically, but it can easily and quickly erasable by water The water soluble ink can disappear automatically. This pen work great when you need your marks to be visable for a period of time When it's time to remove the marks.just spray a little clean water over them and they will disappear