Fabric Vanishing Marker - Collins

A sewing must-have and a good quality brand.   This air erasable vanishing marker makes a bright, easy to see purple mark on your fabric.  Marks stay put for up to 48 hours before fading away to nothing, but can be removed earlier by dabbing with cold water.  Test on a scrap just in case.

I use mine absolutely all of the time. The pen tip is more precise than chalk and marks do not rub away. In fact I sometimes draw whopping great long lines all over my work, safe in the knowledge that the marks will be gone by the time I've finished sewing.  Highly recommended!  Full instructions on the back of the pack.