Well-ventilated mesh and soft polymer inserts. Suitable for people with a high instep. Proprietary R-LOOP lacing system. Unraveling when the bow or knot is untied. Onside of the back and tongue is made of moisture-wicking material. Removable insole made of OrthoLite material. CM-EVA with DURA-RYD cushioning midsole. Shear Cantilever System heel.