Ecco Receptor - Kilimanjaro (Navajo Brown/Bison) - Women's: Oiled Nubuck and textile combination upper. Advanced research Receptor technology. Exo-Skeletal wrap-around shank support. Compression molded Phylon midsole. Omni-directional lugged Gecko Rubber outsole. Anatomically correct angle of attack heel strike zone. Dual Axis forefoot flex channels.