The Red Lion series is characterized by the new hi-tech midsole called Infinergy, innovative, technological, resilient energy, comfortable, born from the collaboration between U-Power and Basf, international leader in the processing of polyurethane foam; in Infinergy it is composed of thousands of closed-cell and thermoplastic polyurethane capsules that absorb the impact energy of the foot and "return" it with its movement, draining the foot, transforming energy into a positive reaction throughout the day. The materials used for the realization of the S3 SRC Carters are of superior quality and UPower entrusts the production of its footwear to highly professional artisan workers who sign each product with unique quality and style.