From Sorel, the Women's Caribou Horizon GTX Waterproof Patent Winter Boots feature: Full grain leather and patent upper with genuine shearling collar Patented Gore-Tex™ waterproof construction Custom hardware Rubber shell Lace-up front closure with pull tab at heel 200g insulation Removable molded PU like EVA footbed with felt top cloth Injected rubber shell midsole Molded XS TREK EVO Vibram™ compound outsole Approx. 1" heel height Imported.