Enjoy the light, fluid ride of Salomon Sonic Aero running shoes. They are designed with lightweight traction at high speeds on hard urban surfaces, wet or dry. Experience quick-paced training with confident traction and excellent agility. Upper: EndoFIT™ internal fit sleeve hugs the foot in exactly the right places and improves feedback and foot-wrapping. 3D Flex delivers an optimal combination of freedom of movement and a secure fit. Mesh offers breathable flexibility. Flat laces reduce irritation. Midsole: 3D Ride responsive and dynamic cushioning feels smooth and cushioned on consistent or uneven surfaces. EnergyCell+ provides long-lasting rebound. Compressed EVA. OrthoLite®sockliner.Outsole: Non-marking ContaGrip provides optimal traction on a variety of surfaces.