A true hybrid because they match the slip-on ease of a thong with the performance characteristics of a toe loop style sport sandal the Chaco Zong women's sandal even offers hybrid styling. On one hand the toe loop sans heel strap offers a fashionable alternative to common strap configurations yet on the other hand the black sole complete with Vibram® outsole lends a utilitarian look. Overall this makes for a truly unique look. Hidden underneath the surface The Chaco Zong sandal's pull-through straps offer micro adjustment capability for the perfect fit or the option for a loose slip-on fit when all you want to do is tae the trash out. The Chaco Zong sandal also features a BioCentric™ footbed contour that concentrates the fatty pads in the heel for optimum cushioning and encourages neutral positioning of the foot for healthy biomechanics throughout the stride.