Brooks Men's Ghost 2 Running Shoe 100% Mesh and synthetic Rubber sole Full Length BioMoGo provides a more cushy first feel that lasts and is enviornmentally friendly Rearfoot and Forefoot Hydroflow enhance midsole cushioning Full-length S-257 Cushsole gives the runner even more cushion with each stride Universal Sprung Platform allows the foot the transition from heel to toe more smoothly Profile Sockliner addes a great first feel on every run