The Gel-Cumulus Running Shoe Keeps Getting Better And Better, Both Dropping Weight And Adding More Gel Cushioning In This Newest Edition: The Gel-Cumulus 16. A New Fluidride Midsole Helps Reduce Bulk While Adding Responsiveness And Overall Road Feel, And Those Looking For Stability To Go Along With All That Cloud-Like Shock Absorption Will Be Happy To Know That The Updated Guidance Trusstic System Keeps Things Structured And Secure As You Run Mile After Mile In Supreme Comfort.