DESIGN: CLARINO Trivela(TM) microfiber upper delivers lightweight support and flexibility WATERPROOF+ breathable membrane fused to lining and sealed with waterproof bottom gasket ARIAPRENE(R) tongue & bootie offers supreme foot lockdown for maximum stability and breathable support CARBITEX GearFlex(TM) propulsion plate helps harness ground reaction forces more effectively IN-SHOE COMFORT: PMXNitro+ Footbed delivers lightweight responsive cushioning for the life of the shoe PMXNitro+ Midsole provides maximum energy return & ultimate under foot support DURABILITY & TRACTION: TPU Outsole with Fast Twist insert system delivers multidimensional traction for the life of the shoe