The iron on labels are designed to be permanently attach on the garments. So it's a little bit hard to be peeled off.
However, you can try the below 2 approaches:
* Wash the garment with very hot water.
* Use a hair dryer to blow on it. After heating it for a while, attempt to peel it off slowly.
So if you plan to remove the labels in the future, we recommend to use our sew on clothing labels instead.