DuraMax? Rubber OutsoleDuraMax is a proprietary rubber compound that provides turf gripping and performance and durability.Pulsar? Cleats by Softspikes?Pulsar cleats by Softspikes? are the #1 selling cleat in golf and the overwhelming choice of touring professionals worldwide. The Pulsar cleats feature all the same turf grip and walking comfort advantages of Black Widow plus the additions of and radiused legs for extra durability and cleat webbing for easier cleaning.