The OPANKA SANDAL uses leather that is tanned naturally, without chemicals, for a handmade sandal which is both sustainable and stylish. Enjoy the barefoot experience with a flexible, 3 mm thin, pucture-resistant barefoot outsole that allows you to feel the ground beneath your feet. Made in Portugal. Hand cut; traditionally-crafted leather uppers, stitched by hand for quality and durability. Vegetable-tanned leather.