Saucony Type A fabric ** NEW ** IBR+ - Injection blown rubber compound that is lighter, more responsive and has enhanced cushioning and durability properties ** UPDATE ** 0mm Offset - Heel to toe of the shoe, provide a more natural running motion for your feet. Flex Film Overlays - Thin, flexible film welded onto the upper that is supportive and lightweight used to reduce layers. SSL - Saucony Super Lite EVA - An advanced EVA blend that maximizes rebound and durability while minimizing weight in the shoes, giving you a comfy and cushioned ride. Air Mesh Upper - Giving your feet maximum breathability and helps to reduce overall weight