Features: Fitz-Rite: The soft internal construction supports the midfoot for the purpose of enclosing the foot for optimum fit and to prevent unnecessary movements. The molded lightweight heel cap keeps the heel comfortably in place while running. Pressure-free tongue designed to provide comfort and prevent irritation. Full outsole makes direct contact with the surface. Blown rubber forefoot and the carbon rubber heel. The QU!K Spine is a carbon plate that ensures stability on the midfoot. Quik Flex forefoot ensures a natural and balanced settlement and improved contact with the ground for optimum acceleration. Powered by QU!KFOAM.