One of the most unique products that we offer on our shoes is the Lactae Hevea outsole, manufactured by Reltex in France. While they offer many patterns and styles of lactae hevea outsole, the raw material is the real star. Lactae heavea is the milk from the hevea tree, which is harvested by hand (see picture below). It is important to note that harvesting milk from the trees is a sustainable process, it does not damage or kill the trees. After harvesting, the milk is shipped to the Reltex plant where the liquid is poured by hand into outsole moulds. There are no machines or harsh manufacturing processes used, just the passage of time. The result is a 100% natural outsole that is lightweight, durable, and extremely comfortable. Trust us, this will be the most comfortable pair of shoes you will own. We have one option available now and another coming soon. In the meantime, feel free to contact us if you want to put a lactae hevea sole on any style of shoe in our shop.