Is it inappropriate to wear a Vietnam era green official military issued fatigué shirt?

I love the military. I have a great respect for anyone who has served including my father who has passed away (Coast guard) and my Bf (Marines).

I always wanted to join but couldn't due to something I was born with.

I found and purchased this amazing piece of history and it is in great shape. I don't particularly want to leave it in a closet. It fits me okay and I love the look but I don't want to be disrespectful or seen as someone pretending. It was from quite a long time ago and I am in my 20s so I don't think anyone could mistake me for serving in the Vietnam War but I don't want any problems for it or to do anything wrong. My Bf says he doesn't see a problem with it but I wanted to get some other opinions.