Saucony Guide 9 running shoes deliver supportive guidance for more efficient runs. You'll enjoy the flexibility and light weight you feel throughout your gait cycle. A lively, resilient ride and continuous cushioning enhance the comfort in every step.Upper: FlexFilm lightweight yet strong material allows for fewer layers in the upper for a seamless, flexible feel. RUNDRY Lining combines superior moisture wicking properties with a plush feel for comfort. Padded tongue and heel collar enhance comfort. Flat laces reduce irritation. Mesh provides breathable flexibility.Midsole: EVERUN Continuous Cushioning provides a lively, resilient ride, continuous cushioning and enhanced energy return properties that deliver an energized running experience. Dual Density, SSL EVA maximizes rebound and durability while minimizing weight. SRC Landing Zone provides durable shock absorption in the heel crashpad to help reduce torque and allow for a smooth transition into the midfoot.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.