Imported BOOST midsole Fitcounter heel counter Imported Some days start before the sun rises. Other days keep you out after dusk. These adidas Ultraboost running shoes have glow-in-the-dark details that light up in the low light. Their signature, responsive feel - with energy-returning BOOST in the midsole and a soft, adaptive adidas PRIMEKNIT upper - keeps your feet comfortable, no matter the time of day.