WR904 New Balance running shoes feature a lightweight low profile training shoe that provides added medial stability through TS2 posting while maintaining a smooth responsive transition. ABZORB heel and forefoot provides excellent cushioning and comfort. TS2 posting provides a gentle roll from heel strike to toe-off. Acteva Ultra Lite Midsole premium ultra lightweight midsole material with optimal compression set properties. NLOCK an integrated lacing and webbing system that provides optimal fit, support and security. SURE LACE is a computer knit lacechord designed with a reciprocating wave pattern that will not untie under high performance or inclement conditions. Stability Web is a structured lightweight arch support that provides optimal rigidity preventing midfoot flex. Ndurance outsole is a rubber compound for maximum durability used in high wear areas. ABZORB heel and forefoot provides excellent cushioning and comfort. Phantom Liner provides seamless lining. Forefoot Flex Grooves allow extreme flexibility. Lightweight Mesh Upper. Blown Rubber Forefoot for lightweight cushioning