For the freedom of a barefoot running experience with protection from rugged terrain, Vibram Spyridon minimalist running shoes are the perfect choice. The separate toe pockets are made to strengthen your toes and improve balance while the innovative design is sure to turn heads. These Mud Runners provide confidence and secure grip over muddy and rough terrain.Upper: Stretch mesh and polyamide provide flexibility and breathability. Coconut Alive Carbon is light and porous, increasing air flow and allowing for natural range of motion. Convenient Speed laces provide a fast, secure fit.Midsole: A molded 3D cocoon nylon mesh in the midsole adds a rock block effect, dispersing impact over a larger area. An anti-microbial Dri-Lex® sockliner wicks sweat away from the foot to help keep feet dry and comfortable. Stitched-in polyurethane insole helps protect skin and foot tissue during longer runs. Outsole: Aggressive tread design offers solid grip in all directions. 3.5mm rubber outsole maximizes impact protection from stones and debris.