“The vast majority of public comments show what we’ve always known: people love their national parks and deeply value the dedicated staff who protect them every day,” Pierno said.

Each of our national parks is an expression of what is best about America. Among the parks we love most, it’s impossible to pick a favorite. I, for one, love them all equally.

How we chose our contenders. The sheer volume of white T-shirts on the market is overwhelming — you can spend a few bucks or splurge $50+ for a premium fabric blend.We tested shirts across ...