Saucony Men's Echelon 5 Road Running Shoe 100% Synthetic/Nylon Imported Rubber sole Road training shoe with stablizing midsole and removable footbed to accomodate orthotics Sauc-fit system Run Dry water-resistant lining ; 6mm PU sockliner for superior comfort, cushioning and durability 8mm heel-to-toe offset ; Support Frame enhances rear foot stability upon impact. PowerGrid cushioning