Gently used ! See pictures ! It’s speed over everything when you lace up the Endorphin Pro 3. Designed with a carbon-fiber plate and an even thicker stack of PWRRUNPB foam cushioning, you get more pop underfoot for the ultimate go-fast experience. FEATURES & BENEFITS Max stack PWRRUNPB, an elite-level technology best known for its responsiveness, meaning it quickly returns energy to the runner with each footstrike S-curve carbon-fiber plate designed to facilitate a more efficient energy transfer from heel strike to toe-off, giving a spring effect to every step SPEEDROLL Technology encourages a smoother and easier run by helping you roll from heel to toe with less effort so you can faster, not harder FORMFIT design hugs every part of your foot while allowing full natural movement for a personalized fit XT-900 rubber for durability and traction, gripping the road to keep you moving forward Suitable for racing, tempo running or interval training, road running, and various types of fast running