CAMPER Yellow leather kids' Mary Janes with hook-and-loop closures, EVA footbeds and rubber outsoles. In 1988, CAMPER challenged the idea that shoes should be identical, designing a mismatched pair with asymmetric details — and their iconic TWINS was born. The outer material is 100% cowhide leather. The sole is made of 80% Rubber and 20% Recycled Rubber. Better Leather.