Revel in dynamic, energizing cushioning from mile one through miles x, y, and z when you lace into the Saucony(R) Freedom ISO running shoe. Predecessor: None. Cushioning: High energizing cushioning. Support Type: Neutral. Surface: Road. Differential: 4 mm. Engineered stretch mesh and lightweight synthetic upper materials. ISOFIT creates a dynamic fit that adapts to the shape and motion of the foot. Lace-up closure. Sleek Support Frame for better fit and hold at the heel. Thin tongue and padded collar. Smooth fabric lining offers a great in-shoe feel. Removable foam insole. Full-length EVERUN midsole provides enhanced energy return and continuous cushioning. Heel/Toe: 19 mm/15 mm. Highly-durable TRI-FLEX crystal rubber outsole. Weight of footwear is based on a single item, not a pair.