Express yourself while looking and feeling good doing it. Our shirts are not only expressive, but they're also printed using our specially developed environmentally friendly methods. We care about the environment and know there's a whole lot we can do to make this a better world, starting with our own back yard. The blank shirts we print on are made from the finest cotton, and are guaranteed sweatshop free. So get Grumpy and see how good it feels.

Pi or π is a mathematical constant whose value is the ratio of any circle's circumference to its diameter in Euclidean space; this is the same value as the ratio of a circle's area to the square of its radius. It is approximately equal to 3.14159 in the usual decimal notation. π is one of the most important mathematical and physical constants: many formulae from mathematics, science, and engineering involve π. Although not a physical constant, π appears routinely in equations describing fundamental principles of the Universe. Found in nature, in the shapes of sea shells and the curves of vines and the ripples of a pond. this formula has inspired centuries of architects and artists resulting in some of the most stunning and beautiful and strong physical art in the world.Of course I had to be a total nerd and float a Magpie over top of the block of 2,623 digits of pi in this illustration.

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