Cairn Evo 3D Features The improved Evo 3D footbed is zero-drop and anatomically molded with tasteful arch support. Also featuring a refined and comfier toe-triangle. 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 Design.Upper: Premium polyester and nylon webbing Outsole: Ultra durable VibramA(R) XS Trek EVO rubber compound Strap System: Bedrock&';s Patented Y-Strap 3 point adjustment system. Weight: 8.7 oz per size 9 sandal Stackheight: 16mm stack height, zero drop Underfoot: Firm + durable molded EVA foam footbed Manufactured: US Assembled of Foreign Parts