PUMAGRIP - The PUMAGRIP outsole is made of durable rubber and offers multi-surface traction. ENGINEERED MESH - Premium material engineered for breathability and reinforced with PWRTAPE. DUAL-DENSITY NITROFOAM - Dual density nitrogen-infused foam that is co-molded for a seamless transition from the soft core to cushion landings to the firmer rim to guide the foot during the running cycle. TPU HEEL SUPPORT - Additional TPU support at the heel provides the runner with stability at foot strike. This model seamlessly blends responsive NITRO foam 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. The TPU Heel Clip adds stability at foot strike, while the wide geometry ensures an exceptionally stable base of support. With a highly cushioned collar and breathable engineered mesh, enjoy unparalleled comfort with every stride. Run forever in FOREVERRUN.