Saucony LiteForm Feel Trainers GrayThe TRI-FLEX sole works together with the EVERUN topsole to distribute pressure over a larger surface while giving us flexibility and optimal traction. Saucony LiteForm Feel Trainers GrayThe TRI-FLEX sole works together with the EVERUN topsole to distribute pressure over a larger surface while giving us flexibility and optimal traction.Thanks to the FORM2U Memory Foam insole, which imitates the shape of the sole of the foot, it achieves great comfort and adaptation.Reference: s40008-21