A minimalist shoe for off road mud runs, the Vibram FiveFingers Spyridon MR excels on wet, slippery terrain and is protective enough to traverse safely over uneven ground. . Minimalist 4 mm Vibram Megagrip rubber outsole for excellent grip on dry and wet, slippery terrain with high durability. Multidirectional tread design for solid grip in all directions. 3 mm polyurethane insole helps protect skin and foot tissue during longer runs. Molded 3D cocoon nylon mesh in midsole adds a rock block effect for lightweight protection disperses ground pressure by distributing impact, so you experience ground feedback with less bite. Polyester fabric upper with speed lacing. Antimicrobial Dri Lex sockliner wicks moisture and helps control odor. Off road shoes for mud runs. Machine wash cold air dry away from heat sources.