The GEL-CUMULUS 22 MK running shoe is an excellent choice for neutral runners that want a soft, flexible everyday trainer with an excellent fit. This version features a knit upper for a lifestyle appeal.The FLYTEFOAM technology midsole is softer than the previous version to promote a pillowy ride. Under the heel where the foot first hits the ground has been redesigned to better isolate impact. This new heel design has deeper forefoot flex grooves and a softer midsole foam to give you a plush ride. A hard-wearing AHAR rubber outsole compound has been placed in key contact areas to help the GEL-CUMULUS 22 MK shoe stand up to a ton miles.FLYTEFOAM Propel technology in the midsole offers excellent bounce and toe-off AHAR rubber outsole compound has been placed in key contact areas of the outsole to better resist wear.