The Pacific Marine Collection breaks the boat shoe mold by introducing Shark Airâ„¢ technology to boat shoes. Shark Airâ„¢ provides unequaled heel cushioning and shock absorbtion. No other boat shoe has this type of cushioning technology combined with a premium leather upper and patent-pending, high-traction Shark Grip&trade Non-marking outsole. Removable anti-microbial milded foot bed, rust proof eyelets, lycra and neoprene stretch panels, and hand sewn leather upper.