Skechers Mens GORun Ultra 2 Running Shoe (10.5 D(M) US, Navy/Orange) Synthetic-and-mesh Synthetic and mesh fabric upper - offer support and breathability. 4 way stretch mesh side panels - for added comfort. Synthetic overlays - providing more stability. GOimpulse Sensors on outsole - allow for a smoother transition and optimised running experience. M-Strike zone - promotes a fluid transition and efficiency in each stride.