The Yeezy Powerphase is a bring-back of the original adidas Powerphase, a workout and training model from the 1980s. Yeezyâs version took the gold âPowerphaseâ lettering from the original shoe and replaced it with âCalabasasâ text, also creating a pack of Calabasas-themed sweats to go along with the shoeâs release. The simple low-top Yeezy design is best known for its tonal colorways, like the original off-white tone that the Powerphase debuted in. Key colorways include the âCore Black,â âSimple Brownâ and âClear Brownâ versions.