The Waterpro Maipo from Merrell runs fast wet or dry - a prime candidate for canyoneering as mesh upper drains automatically via ports in micro mesh upper and in antimicrobial footbed. Dynamic lacing system locks together a micro-mesh upper and supportive synthetic leather strapping. Air Cushion midsole for amphibious ventures includes Q-Form stride alignment for women. New Vibram Waterpro Plus sole has softened chevrons for land heavy siping for wet surfaces. The Waterpro Maipo features a Slip Lasted Construction. Synthetic Leather / Ventilated Mesh Upper. Micro Mesh Free Flowing Drainage Ports. Lycra /Neoprene Padded Tongue and Collar. Injection Molded TPU Rear Foot Stabilizer. Free Floating Heel / Dynamic Lacing System. Synthetic Leather Toe Bumper protection/ Integrated Drainage Ports. Hydro Drainage / Ventilated Footbed with Etc Anti-Friction Lining Treated with Aegis Antimicrobial Technology. Nylon 6.6 Injection Molded Arch Shank. Q-Form Triple Density Compression Molded EVA Footframe (Women) Merrell Air Cushion Midsole. Water Friendly Non-Marking/Razor-Cut Sipped sole. 3.5 mm Sole Lug Depth. Vibram Water Pro Plus Sole/TC5 Rubber. Vegan Friendly Footwear.