So I like to go backpacking. I was wondering if anybody could tell me where I could buy a lightweight, button-down, long sleeve plaid hiking shirt. I don't want it to be cotton; some sort of poly-blend would be ideal, but as long as it's lightweight and synthetic I'd be very happy. I would like to be able to wear it in the spring and summer. Something like the shirt the guy in this video is wearing http://vimeo.com/18280328 (skip to around :23). Thank you!