Our Keep Calm and Go Green design for cyclists is also available via Amazon. The top is offered in Cranberry red (shown); Kelly Green, and Olive green. Get this fun spoof shirt in cuts for men (unisex), women, or youth. 

Get ready for a big cycling event or environmentally conscious outing with this Keep Calm and Go Green design for bicyclists. The familiar spoof design uses an icon of a bike in the place you'd usually find the British style crown. This 100% cotton tee is super comfortable for everyday wear, has a classic fit, and lightweight feel.

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Celebrate Pi Day next month by having a piece of pie! Pie Day is so named because March 14, 3/14, represents the first three digits of pi. 

This funny shirt is great for math geeks -- and great to save for Pi Day next year. The spoof slogan here is "I Can't Keep Calm I'm Irrational". 

Pi is proven to be an irrational number (it can't be expressed as the ratio of two integers). Of course, irrational may also describe a person who is nonsensical, which makes this spoof t-shirt design funny on multiple levels. 

The crown icon is replaced with the symbol for pi which is the Greek letter π. The design is done in all black and is shown here on a unisex American Apparel basic tee.

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