Light, breathable synthetic upper with PU overlays in high abrasion areas for added protection & durability Pull loops on heel & tongue for easy on/off Anti-fatigue, molded Contoura Support footbeds with shock-absorbing foam Full-length Charged Cushioning midsole for the ultimate in lightweight, shock-absorbing comfort​ Durable Vibram XS Trek outsole is responsive on unpredictable terrain with great flexibility & wet traction Fast-rope compatible arch resists wear from ladders & fast-roping