Feel light, feel fast. Designed for everyday runs, the FuelCell Prism Energy Streak pairs lightweight support with propulsive cushioning to give you the confidence you need to fly. Mesh upper for a lightweight, comfortable fit and feel. 6 mm drop: Due to variances created during the development and manufacturing processes, all references to 6 mm drop are approximate. FuelCell foam delivers a propulsive feel to help drive you forward. Medial post helps control pronation. Iridescent accents for added style. Weight: 244 grams (8.6 oz). Imported.