Precision formed, ceramic rolling ball point gives smooth movement across fabrics without snagging or damaging the weave. The 0.8mm point gives a fine line that doesn’t bleed and gives an even laydown of ink, right to the last drop.
The ink is a pale blue and deepens after a few moments. Lines are easily removed with the Sewline Aqua Eraser or water. Do not iron marks.
Wonderful for embroidery and marking on light coloured fabrics. 
I love to use this pen when marking my darts and any other marks on my clothing patterns. I get a nice thin smooth line, the fabric doesn't pull and the pen doesn't dry up like my felt marking pens.
 
Watch this video: http://www.sewline.com.au/video/styla-2/