Lace up innovation. Raise the bar of your runs with the PUMA Foreverrun Nitro. Designed to offer stability, durability, and a cushioned ride, these trainers boast a full-length NITRO midsole atop a RunGuide system. The ForeverRun NITRO — PUMA's newest guidance solution in its performance running line, offers durability and comfort in every step. Let your feet experience unmatched support, alignment, and guidance each time you step out for your runs with the PUMA Foreverrun Nitro. PUMA Foreverrun Nitro features: Engineered mesh upper adds support and breathability. Dual-layered midsole with firmer Nitro foam on the outside and softer on the inside is lightweight and provides superior responsiveness and cushioning. Outsole with a wider medial rubber segment optimizes overall pronation control. Asymmetrical heel counter stabilizes the foot at impact and early pronation. RunGuide system is a combination of geometry, foam densities, and supportive features that promotes proper alignment and keeps the foot centered through each stride.