Stephen Curry’s birthday is just a few days away on March 14th, also Pi Day, the annual celebration of the mathematical constant π.

Every year, Under Armour designs a special birthday colorway of Stephen’s current signature shoe to celebrate. Usually it’s loud and colorful—a party shoe. This year, though, Stephen wanted something different for his big day.

To commemorate his birthday this year, Under Armour designed a special off-court Curry 7 player Polo (PE), the Curry 7 Pi Day PE.

The Curry 7 Pi Day PE is a clean yet fun design that Stephen and his fans can wear off the court. It features a sleek all-knit, laceless Black upper. The limited-edition shoe has a white heel featuring both UA HOVR and Micro G cushioning platforms and is separated by a flexible, Black plate. The first 30 digits in Pi, 3.14159265358979323846264338327, can be found on the heel tab.

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Look for the UA Curry 7 “Pi Day” PE to release on March 14th at select retailers and UA.com. The retail price tag is set at $140 USD.