Vintage Boulder Colorado t-shirt with a classic distressed and worn look. The Boulder Colorado vintage t-shirt design makes an excellent patriotic clothing choice. This unique vintage t-shirt also makes a great gift idea for those who are proud to be from Boulder Colorado and who love Boulder Colorado CO. The retro Boulder Colorado arched vintage sports t-shirt design is printed on a 100% Cotton t-shirt. Pre-shrunk to make sure your size is maintained throughout several washes, and offers a classic fit.