The soles are made of juice or milk from a hevea tree, a premium natural material. Essentially, it is 100% natural latex rubber. Such soles are very comfortable, durable, lightweight, soft and elastic. However, they are slightly heavier than the soles of EVA or TPU. Shoes with a latex sole are 60-80 g heavier. The soles of latex have excellent adhesion to the ground. However, they are much more expensive, as the process of producing soles from latex is quite complicated.