Saucony ushers in its next big thing for runners, the Freedom ISO running shoe. This brand new creation features a full-length EVERUN midsole that provides boundless energy in each and every step taken on the run. An engineered, flexible and ultra-lightweight upper gives runners a totally adaptive fit and feel. Neutral runners will feel the natural freedom of movement enhanced with immense energy return. Upper: Engineered stretch mesh upper for a dynamic, lightweight fit. ISOFIT combines a soft inner sleeve and a floating cage to create a dynamic fit system that adapts to the shape and motion of your foot. Lightweight Streamlined Support Frame locks the heel in place for a secure, stable fit. EVERUN Topsole construction for enhanced energy return. Padded tongue and heel collar enhance comfort. Flat laces reduce irritation. Midsole: Features the first ever, full-length EVERUN midsole providing a lively, resilient ride while offering continuous cushioning and enhanced energy return properties. Outsole:Highly durable Tri-FLEX crystal rubber outsole provides increased force dispersion over a greater surface area while also delivering optimal flexibility and traction.