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As if keeping calm wasn't an option, right?  As one of our most popular 420 shirts, this one also one of Guerrilla Tees' best-selling Keep Calm t-shirts.  Inspired by the original Keep Calm and Carry On posters from Great Brittan in the late 30's, this is the perfect shirt for wearing to the bar, concerts, hanging with friends, or grooving to trippy music.  It's super soft, made from superior materials and professional screen printing, and available in both black and military green.

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