What is the oldest piece of clothing you still wear and how old is it?

I just put on a pair of old gym shorts. These shorts are navy blue, cotton I believe, and purchased to adhere to the dress code for gym class at my Catholic High School. That gym class was in 1993. These shorts I am wearing are 32 years old. No holes, the elastic is bad, but they still tie. They have been washed and worn regularly. What is everyone else's oldest piece of clothing?