Full grain leather uppers offer outstanding waterproof comfort, breathability, and durability.ECL or"Extreme Comfort Leather" is a new proprietary waterproofing system developed with Pittards of England. It is a membrane-free leather with a 2-year waterproof warranty. ECL Advanced Waterproof Leather is 30% softer than previous generation FootJoy performance leather.FootJoy warrants that this golf shoe will be waterproof innormal usefor two years (U.S. Warranty). Leather linings provide superior comfort and in-shoe breathability.Varying densities of PU (poly urethane) are molded into the Fit-Bed for added support and comfort. The Fit-Bed is embedded with Dryz IntelliTemp phase change technology. This technology pulls in heat and stores it away from the foot, keeping it cool during play.GelCollar is a visco-elastic gel molded to match the shape of the ankle. The technology provides additional comfort and support around the collar. GelCollar also contains IntelliTemp. This techn