Constructed with our thicket piece of nitrogen-injected NITRO foam in the midsole, this shoe is built for long runs where comfort is your top priority. - PUMAGRIP: Durable performance rubber compound designed for all-surface traction DETAILS Premium knit upper - Moulded heel collar for enhanced heel fit and comfort - NITRO foam midsole - PUMAGRIP rubber outsole - Rubber placements on the heel for durability - Best for: Neutral pronation