For efficient outdoor performance, wear the Chaco OutCross Evo 2 sandal. This pair has a barefoot construction that offers a close-to-ground feel. The EcoTread outsole of this sandal is made from recycled rubber compound. You stay sure-footed on rough terrains, owing to the molded siping and lugs on this outsole. This sandal has a LUVSEAT PU midsole that offers lateral stability. It is treated with antimicrobial protection that controls odor. There is a nylon shank for added stability and durability.