Step into next-level speed and support with the updated FuelCell Prism v2. A bed of New Balancersquos springy FuelCell foam delivers unbeatable rebound and response with every step. Combined with a durable medial post system, the Prism v2 stabilizes your stride while remaining cushioned and comfortable. Designers updated the fit and feel of the FuelCell Prism v2 with a breathable synthetic mesh upper that provides just-right support and flexibility. The upper works with the medial posts in the midsole to offer even more stability through the arch and midfoot.