You're not going to duck hunt for long if you're not comfortable. Frogg Toggs Amphib 3.5mm Neoprene Bootfoot Wader duck hunting waders keep you warm and dry; even in extreme conditions. The Frogg Toggs Amphib 3.5mm Neoprene Bootfoot Wader is designed to keep you in the field with 600 grams of Thinsulate insulation. When you need more than just waterproof protection in your waders, neoprene does more than double duty. It provides warmth, durability and waterproof protection. The Frogg Toggs Amphib 3.5mm Neoprene Bootfoot Wader are constructed with a 3.5 mm neoprene.