The FuelCell Rebel v5 was built to look and feel fast. With its streamlined. race-inspired mesh upper and colorblocking designs. the resulting silhouette boasts a modern style that inspires. surprises. and confidently stands out ahead of the pack. Incredibly lightweight. its blend of PEBA and EVA foams and considered midsole geometry provide a responsive and energetic underfoot. ideal for those miles you want to feel fast. Equipped with FuelCell midsole technology. this upbeat trainer can easily transition from long. steady runs to something swifter and more spontaneous.