Montrail - Custom fit via thermo-moldable CTX foam over a dynamic molded arch piece makes this an ultra-comfortable insole, good for ultra-long durations on your feet.Special Features: A custom fit insole that works dynamically with your foot providing the right amount of spring and support to accommodate running, walking, hiking or backpacking.Features:CTXIntegraFitMolding InstructionsTopsheet: Brushed microfiberFoam: CTX thermo-moldable foamBase: High-density EVAStructural Arch: Injection-molded PBAXWeight: 15 oz./.42 g (size 9)