The New Balance M8505 is an innovative cushioning shoe with a responsive ride developed for runners with a neutral running gait. It features a NB ZIP™ heel, which is responsive cushioning technology that is supported by strategically, located shock-absorbing struts. It has an ABZORB® SBS forefoot for maximum shock absorption. Also has an ACTEVA® LITE midsole with compression molded EVA for cushioning and flexibility.The M8505 has a N-DURANCE® outsole, which is a rubber compound, designed for maximum durability in high wear areas. A synthetic/mesh upper for lightweight durability and breathability.