Neos Navigator 5 Overshoes-M 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. They have an expandable gaiter top that can roll-out to increase boot height to 20 inches. They have an aggressive Vibram Ninja outsole which offers superior traction on ice, snow and slush. The Navigator 5 overshoes are lightweight to prevent foot and leg fatigue with a wide, easily opened gusset provide ease in putting on or taking off overshoes. Features: Woven polyester upper fabric with waterproof membrane 15” height, extends to 20” with gaiter Aggressive Vibram Ninja outsole Duraflex quick-release closure Comfort rating of -29°C 100% waterproof Fits orthopedic footwear Gray colour 3.3 lbs weight Please check photograph of size chart. If wearing boots manufacturer recommends to go up one size. Back label needs to be restitched if desired- no disruption to wear. Buying As Is no returns