The Saucony Guide 10 provides the guidance and stability that runners have loved for years with a updates. An engineered mesh upper provides runner with a dynamic, comfortable fit and the Tri-Flex outsole ensures excellent transitions from a highly flexible forefoot. Runners with a desire for a light, stable and responsive ride will enjoy the newest support installment. Upper: Engineered mesh upper for a dynamic, lightweight fit. FlexFilm lightweight yet strong material allows for fewer layers in the upper for a seamless, flexible feel. Padded tongue and heel collar enhance comfort. Flat laces reduce irritation. Mesh provides breathable flexibility.Midsole: EVERUN Topsole Construction andContinuous Cushioning provide a lively, resilient ride, continuous cushioning and enhanced energy return properties that deliver an energized running experience. Added midfoot structure for the ideal hold and support for the runner in motion. Outsole: Tri-FLEX provides increased force dispersion over a greater surface area while also delivering optimal flexibility and traction. iBR+™ is 33% lighter and provides more cushioning compared to standard blown rubber. XT-900™ premium carbon rubber outsole material offers exceptional traction and high-wear properties.