I was browsing your channel, found that you wear a lot of collared shirts. I asked my roommate why in each time, your collar is down and not up. He said that it was your choice. How come your collars are down?
Men's shirts usually have a lot of structure built into the collar (other plastic parts and stiff liners) that make the collar stay upright. In the case of silk, it likes to slide down 🙃
