Flow Micron Snowboard Boot Kids Boa M3 Closure SystemRubber Cupsole OutsoleEVA Insole1-Feather Micron 3D-molded LinerMoisture Wicking LinerSilvadur Antimicrobial CoatingSpaceBlanket InsulationSupport Rating: 2 (1 = softest/forgiving and 10 = most supportive/responsive in the Flow line)