The Bonny new chukka boot is crafted in extra tough polyester for durability and in a range of utilitarian colors, for style. Rubber paneling Side-wall stitching Large air-cushioned chambers in the soles Wider, generous fit Retains all the the Docs DNA, like grooved edges, visible stitching and a scripted heel-loop Built on the iconic AirWair™ air-cushioned sole Upper: 70% Poly, 30% Rubber Lining: 100% Textile Sole: 100% PVC