j.h & f non-iron supercotton with taped seams J.H&F Non-Iron Supercotton. We are really proud of our shirts, and we want to show how great these garments really are. So we made this shirt. On your right is our J.H&F Non-Iron Supercotton with taped seams, the left half is common cotton single yarn 70’ without taped seams. We washed it. Hang dried it and folded it neatly. We did not iron any parts of the shirt. As you can tell there is quite some difference. Notice the overall smoothness and pay extra attention to the shoulder seams. The regular fabric is not of poor quality. It’s just not... Supercotton.