Mesh upper Lace up closure NITRO FOAM midsole PUMA Formstrip and Nitro wording at lateral side Thermoplastic Urethane heel piece provides stability An All-In-One Neutral Running Shoe For Any Distance, The Velocity Nitro 2 Is A Lightweight And Sleek Update To The Run Puma Roster. Featuring Nitro Foam For Exceptional Responsiveness And Ultimate Cushioning, This Upgrade To The Original Is A Well-Fitting And Durable Shoe For A Smooth Ride. Built For Comfort At Whatever Speed, The Versatile Runner Also Provides Enhanced Visibility Through Reflective Accents, So You Can Hit Your Stride On Your Time. Pumagrip Offers Multi-Surface Traction, From Treadmill To Track.