The Mephisto Charles is a sturdy walking shoe with a substantial thickness to the base that will absorb shock from walking all day long. The materials are used are very soft and flexible. Leather uppers are cut from the same hide and paired for uniformity and durability. Mid-soles use Soft-Air Technology providing light airy cushioning to every step, relieving impact on the knees, hips and lower back. The natural rubber outsoles are long lasting and slip resistant. Removable insole.