The Martin Sherpa from Hey Dude Shoes is a rough-cut mule for the ultimate comfort in wide, casual footwear, with the addition of premium organic, sheepskin wool insoles. A slip on mule, with roughcut pinched seams that accelerate the wearing process, giving the shoe a laid back frayed look with the extra comfort of memory foam, wool insoles. The Ridgewide sole unit and ultra-relaxed wide fit guarantee that this will be one the most comfortable shoes you will ever wear.