Natural Eco-Friendly Cork Sandals. Our Sandals are all natural and hand-made in Portugal. Both the manufacturing and materials all come from Portugal making it an extremely eco-friendly sandal with a low carbon footprint. They are made from natural latex and cork mix both biodegradable, the strap is made from cork fabric and the sole is made from 50% recycled rubber. New soft padding made from 100% biodegradable natural latex intergraded in the foot bed.