Our highest performer, the NEW Cairn Evo 3D PRO is the ultimate adventure sandal. Upgraded with a more refined 3D toe-triangle and abrasion-proof wing construction. Extra-sticky VibramA(R) Megagrip outsole and unique hook-and-loop system locks feet in from heel to toe for a fit that won&&';;t fail in the frothiest rapids or thickest silt. Upgraded to our new Evo sizing + fit standard. Cairn Evo 3D PRO Features G-hook-and-loop heel and front strap system creates an extra secure foothold that won&&';;t gum up in mud or pull off in whitewater. Improved 3D footbed is zero-drop anatomically molded with tasteful arch and a refined toe-triangle for support. Built for those seeking extra support or looking to log big miles. The footbed is firm, durable, and may require some break-in time. Patented Cairn Evo 3D PRO Design.