THE NEOS NAVIGATOR 5 IS THE ULTIMATE CHOICE FOR COLD WEATHER AND DEEP SNOW WITH IT'S SUPERIOR FIT AND AGGRESSIVE TREAD FOR THE GREAT OUTDOORS LOVERS. THEY ARE ALSO VERY WARM. THE NEOS NAVIGATOR 5 HAS A DURABLE POLYESTER UPPER WITH WATERPROOF MEMBRANE AND 4 MM POLYURETHANE FOAM INSULATION WHICH ADD COMFORT AND WARMTH.