Surf is a boot with an inside that is warm and woolen, and this makes it a great boot for the colder seasons. Surf is inspired by the boots used by surfers too keep their feet warm, after surfing in the ocean for hours. Surf is made of Gravado leather, which is one of our signature materials. The Gravado leather gives a natural look with a grained surface, where all boots have slight differences in texture and depth. This makes every pair of boots unique. Surf has a natural rubber sole. The choice of natural rubber is made to achieve the optimal comfort and is at the same time a benefit for our environment. The rubber sap is hand tapped from the rubber tree (Hevea Brasiliensis) and is 100% free from petrochemicals.