The mission of the Ultra Terrain is to be as versatile as the foot itself. Designed to go in and out of water all day long, this series is devoted to the highly specific demands of amphibious comfort and traction. The tenacious omni-directional outsole and elastic lacing system are just two of the ingenious ways this shoe ensures maximum function as you move between vastly different environments. Open-net construction and hydrodynamic modeling ensures that water and air move through with maximum efficiency. Now you can be comfortable everywhere.