NRS HydroSkin Socks neoprene 3" high 9" wide The 0.5 mm Neoprene core insulates and protect 4-way-stretch PowerSpan outer layer gives you enhanced mobility and greater durability The ThermalPlush inner lining increases insulation, repels moisture and dries quickly Titanium laminate adhesive aids body heat retention without adding bulk DWR coating forces water to "bead" and roll off the material, reduces evaporative cooling