Merrell Tideriser Sieve Men's Walking Shoes Canteen : The water-ready Merrell Tideriser Sieve shoes feature breathable, hydrophobic materials that dry quickly. A special Vibram Wavegrip outsole provides traction on various surfaces from trails to your boat deck. The Hydramorph midsole material features channels and ports for water drainage and ventilation. No matter where your next adventure takes you, these shoes are ready for it all, keeping you comfortable along the way. Upper: Features a water-friendly synthetic and mesh upper. Includes integrated loops for a secure fit. Midsole:Kinetic Fit BASE removable contoured EVA insole with a water-friendly top cover. Compression molded EVA midsole provides stability and comfort. Outsole: Vibram Wavegrip with siping for increased traction on wet surfaces.