Lightweight, breathable synthetic upper with PU overlays in high-abrasion areas for added protection and durability. Waterproof insole for greater protection from adverse influences. Medium side zipper and loops on the heel and tongue for easy on and off. Anti-fatigue molded Contoura Support insoles with shock-absorbing foam. Full-length Charged Cushioning midsole for maximum comfort while absorbing shocks and keeping weight low. The durable Vibram XS Trek outsole responds to unpredictable terrain with great flexibility and traction in wet conditions.