Brooks Men's Glycerin 8 Running Shoe 100% Mesh and synthetic Rubber sole Forefoot and Rearfoot Brooks DNA gives the runner a customized cush with each stride Full-length BioMoGo provides a more cushy first feel that lasts and is enviornmentally friendly Full-length S-257 Cushsole gives the runner even more cushion with each stride Cush Pod configuration enhances natural forefoot flexibility, offering maximum cushioning Moisture-managing Element Mesh provides excellent breathability