I love this shirt. I love Women's Ordnance Worker (WOW), which I had never heard of until I saw the shirt, and of course, I love America's National Parks.
One point to consider about sizing...I ordered a large because I recently bought a women's v-neck t-shirt at the Flight 93 Visitor Center and it fit perfectly. This one is a little tighter than that one, so you may want to consider sizing up.