Weather Rating : Roxy WarmFlight 3 with 200 gram thermal insulation weather rated to -40 degrees C/-40 degrees F, "Upper : Water resistant treated canvas and synthetic leather, "Upper Details : Webbing lace up, Closure : Hiker inspired laces, Insole : Sherpa lined shaft and footbed with Roxy woven label, Outsole : rubber cupsole with aggressive Roxy Alpine lug bottom, Packaging : Boxed, Heel Height : 40mm, Upper: 82% Polyester, "18% Synthetic PU