Hi James! The PureFlow has been a great model over the years, but it has come to the end of its run. The PureFlow 7 will be the last update in this style's line and retire in early 2021. The PureFlow offered a sock-like fit and plush cushioning with a 4mm drop to help you feel connected with what you are running on. We do not have another neutral 4mm cushion model in our lineup today, but the Hyperion Tempo has an 8mm drop to promote a midfoot to forefoot strike. Another lightweight, mid-drop options are the Revel 4, Ricochet 3, and the Levitate 4.