The Merrell Boys's H2Opro Ottawa H2O Shoe was made with the assumption that you were going to push them, and yourself, to the limit. Aegis Antimicrobial has been added to the perforated footbed, the neoprene heel lining, the mesh upper, and the padded tongue to reduce the impact of moisture, while strobel construction wraps and Strengths your foot through all your adventures.