Strobel + cement construction provides superior flexibility and lightweight durability. water resistant nubuck uppers. elastic bungee lace system with locking toggle for easy on/off. spandex/neoprene-lined uppers for advanced comfort and breathability. anti-microbial, anti -bacterial, mesh covered, removable, perforated eva footbed for increased water drainage. eva midsole designed for additional shock absorption and promotes all day comfort. rubber, non-marking, slip-resistant outsole with aggressive, channel-sipped design to offer exceptional grip and stability. c3 (cross channel circulation) technology.