I am in the airline Business for over 35 years and fly for a major foreign airline. The airline has changed its shirts and their quality many, many times. Until now they were not able to produce/order a shirt that would not make your neck hurt and itch after a day's flight.
Your shirts are just fantastic in every way. The collar doesn't hurt at all, not even after a 12 hour flight, without taking off the tie. They feel extremely comfortable on the skin.
I am very happy to have found you and tried out the shirts.