Comfort Feature: Padded collar and tongue helps prevent blisters and lace bruising. Construction: Patented walking Platform - wide base of support for heel and forefoot flexibility. Footbed: Latex Kinetic Air Circulator - durable cushioning with patented active air- circulating technology. Midsole: EVA lightweight cushioning and comfort helps reduce foot and leg fatigue. Outsole: Rubber - durable traction. Upper: Full-grain leather - easy to clean and maintain.