A hooded sweatshirt. A Calgary T-shirt is the least substantial article of clothing that can be worn comfortably outdoors in Calgary, Alberta, Canada where the temperature seemingly never exceeds 14 degrees Celsius even during the warmest part of the year.
"You don't need to wear your touque today Bob, it's beautiful outside! Just throw on a Calgary T-shirt."
by Sean BonJovi November 23, 2007
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