FootJoy Men's DrJoys Casual 53577 Golf Shoe Leather ECL or "Extreme Comfort Leather" is a 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 in normal use for two years (U.S. Warranty). Full Leather Linings provide superior comfort, slip resistance, and in-shoe breathability Comfort Plus PU Fit-Bed provides super cushioned underfoot comfort This TPU intergrated EVA midsole provides lightweight underfoot cushioning.EVA will not allow a foot impression to set in, which translates to increased stability throughout the golf swing.