About RS-Running System - PUMA's RS series revives the 1980s high-quality cushioning with RS (Running System) foam, an improved EVA compound offering superior rebound and enhanced stability. Originally developed by the RS Computer, this technology offers excellent energy return and a secure, confident stride, blending vintage aesthetics with advanced performance. Product Story Step out in style in the latest edition of the RS-Z BP Unisex Sneakers. This fierce footwear reinvents streetwear to create a stand-out look, complete with bold colourways and a slick silhouette. The final touch is the textile upper with texture-enhancing suede and soft PU-coated overlays, for trainers you’ll love to flaunt. - PU midsole: PUMA's Polyurethane midsole assists a smooth foot stride for comfortable wear and a futuristic look Details Low boot - Textile upper with suede overlays at toe - Soft PU-coated overlay at eyestay - Suede underlay at eyestay - PU midsole - Rubber outsole - Lycra collar and tongue - Lace closure for a snug fit - PUMA Formstrip at lateral side