Ecco Receptor - Ko Samui (Navy/Black/Mole) - Men's: Combination leather and textile upper. Full length advanced Receptor technology. Fully adjustable fit action straps and heel locking system. External Exo-Skeletal wrap around shank support. Ultra light and sleek compression molded Phylon midsole with anatomical underfoot architecture for the ultimate in foot sensation. Omni-directional rubber outsole with ECCO's exclusive Octopodal Technology System (OTS) lug design. Anatomically correct angle of attack heel strike zone. Dual Axis forefoot flex channels.