The PUMA Foreverrun Nitro 3 Running Shoes seamlessly blend responsive Nitrofoam cushioning with enhanced support from the innovative runguide system. Dual Density Nitro construction features a soft core for plush cushioning, complemented by a firmer rim that provides crucial support to your stride whenever it's needed. Crafted from mesh upper, polyester lining and Ethylene-Vinyl Acetate (EVA) insole, this pair of shoes features a round toe, lace-up closure and brand detailing on the sides, footbed and tongue. The upper features engineered zones for enhanced breathability and stretch, reinforced with pwrtape for durability and lockdown. Rubber outsole.