Stretch-Fit Topline Binding: Snug around the calf; keeps warm air in & cold air out; 5mm Neoprene Fully Insulated: Provides optimal warmth, comfort & waterproofing; Triple Reinforced: In toe area & quadruple reinforced in the heel; Steel Shank: For additional arch support; Quick-Clean Rubber Overlay: Minimal maintenance & optimal aesthetics; Comfort Range: Sub-Freezing to 85F/30C; :: Men > Boots