THE #1 PERFORMANCE SPIKELESS SHOE MADE FITTER.FASTER.MORE COMFORTABLEPro|SL's comfort has been fortified considerably with the introduction of Stratofoam in the midsole. The StratoFoam cushioning system uses a proprietary blend of materials to provide optimal support and comfort for conditions encountered while playing golf – swinging, walking and everything in between. Designed to absorb shock for max walking comfort and also maximizes energy return to reduce walking fatigue.