Double down on classic comfort with the new carlson slingback mule by dr. Martens. The carlson slingback mule features silky  e. H. Suede uppers, an adjustable strap that can be worn around the heel or flipped forward for a traditional mule look, and air-cushioned pvc sole for flexible traction.   available online at journeys. Com. Please note: this product cannot be shipped to apo/fpo locations, hawaii, or alaska.