My 2005 Nats hat. Not the original, which I bought at Union Station the day in 2004 they announced the team name — that one sadly lost in the booth of a Mexican restaurant on Chicago Avenue in Minneapolis.
That first year nobody knew what the hat was. But wearing a bright red hat with a big W on it in 2005 got you some funny looks. I remember seeing my first one in the wild: at the very tip of the bristlecone pine trail at the very end of (wait for it) Bryce Canyon Natl Park.