FloatRide Energy Foam provides lightweight cushioning and a more responsive ride than original Floatride Foam. FloatrideFuel is an elevated foam platform that provides an energy return, high rebound cushioning experience. Zig Energy Shell A softshell TPU frame wrapped around the midsole enables stable cushioning and durability while conducting a wave of energy to propel you forward. Zig Energy Web Outsole Zig Energy Web Outsole expands and contracts like a rubber band to provide spring back response.