Mephisto's Kalima, extremely comfortable. Soft supple full grain leather uppers, all glove leather lined keeps moisture and heat down and feet comfortable all day long. Removable insoles, perforated to allow air circulation all around the foot. Soft-Air Technology mid-soles provide light airy cushioning to every step, relieving impact on the knees, hips and lower back. Super compression lightweight outersoles provide maximum shock absorption for amazing comfort and protection. 100% natural rubber outersoles are long lasting and naturally slip resistant.