Saucony Men's Progrid Guide TR4 Trail Running Shoe 100% Synthetic and mesh Rubber sole Durable mesh and synthetics, XT-900, Weight: 12.9 oz Heel ProGrid technology for maximum comfort and performance Dual Density Impulse EVA, SRC XTRA forefoot cushioning, EBO protects the foot from rocks SRC Impact Zone for a smoother transition,durable and breathable mesh upper, comfortride sockliner HRC Strobel Board