We are loving these erasable gel pens, especially with them being Sewing themed. 
Available in 3 colours. 
Iron-off, rub-off, non-toxic, water- based ink.
0.7mm tip perfect for writing on medium weight fabric and paper.
Retractable design prevents the ink from drying out.
Ink colours: 
black (tape measure)
pink (sewing machine 
blue (wool) 
Keep away from heat and direct sunlight. Do not wash.