The pen doesn't last long. Ink bleeds and gets less pigmented very quickly. Catches onto fabric and can stop working suddenly. Colour may change because of fabric colours. Not the greatest product.

Pinta muy bien y aguanta mucho!

I bought this pen to write our surname on the outside of our suitcases so they were better identified on the collection belts at airports. I also wrote our address on the inside in case they got lost by the airline.I’ve also used it to write names in my children’s black school shoes.Just don’t forget to shake the pen before each use (you’ll here the ball bearing rattle like a tin of car paint etc.,) and press down gently on the nib of the pen (on a scrap of paper / cardboard etc) to soak the nib in the paint before you start to write on your item.

Muy útil para marcar la ropa obscura de los niños

It's been working great on black cotton shirts and thermal underwear after 3 cold water washings and dried on high heat.