Puma Cell Regulate Child Boys Trainers. These Puma Cell Regulate Trainers are crafted with lace fastening and a padded ankle collar for a secure, locked in fit. They feature a cushioned insole for comfort, a breathable engineered knit to the upper, a transparent air unit to the underfoot, and a moulded sole for grip. Signature Puma branding provides an instantly recognisable urban designer brand mark. Upper: engineered knit, Inner: textile, Sole: synthetic.