The Newton Running Gravity 10 combines advanced cushioning and energy return system with amazingly comfortable mesh to take versatility, comfort, and responsiveness to the next level. Anatomically designed, 3D engineered Air Mesh. Plush, breathable seamless construction. Full-foot Newtonium cushioning and HyLyte insole. Action/Reaction Technology system for greater impact absorption, quicker bounce-back, and less energy loss. Tactical flex grooves to mirror foot motion. Women's specific design and fit. Soles good for the earth's soul, crafted with a new formulation of extremely durable recycled materials and EcoPure to help reduce the amount of waste and plastics in our environment. Textile and synthetic upper. Textile lining and insole. Synthetic outsole.