The view from my world today is umbros. From the late '80's through the '90's, my home had hundreds of umbros. They were ubiquitous. My kids lived in them.
Umbros were an English brand of athletic shorts specifically made for soccer. No one in my home played soccer, but they loved the comfortableness of these shorts. I liked them too because they were easy to wash, durable, and relatively inexpensive.
Is there a piece of ubiquitous clothing at your house?