The Under Armour Curry 7 ‘Pi Day’ honors March 14, a date that has dual significance as Steph Curry’s birthday and also the annual celebration of that most famous of mathematical constants. This off-court edition of the athlete’s signature shoe is updated with lace-free slip-on construction and a monochromatic black finish. Convenient pull tabs are placed at the tongue and heel, the latter inscribed with the first 30 digits of pi.